diff --git a/application/config/migration.php b/application/config/migration.php
index d4853db42..3b95d5c63 100644
--- a/application/config/migration.php
+++ b/application/config/migration.php
@@ -22,7 +22,7 @@
 |
 */
 
-$config['migration_version'] = 233;
+$config['migration_version'] = 235;
 
 /*
 |--------------------------------------------------------------------------
diff --git a/application/controllers/Dashboard.php b/application/controllers/Dashboard.php
index f133c0817..e7d182e06 100644
--- a/application/controllers/Dashboard.php
+++ b/application/controllers/Dashboard.php
@@ -227,11 +227,14 @@ function upcoming_dxcc_component()
 
 		$data['thisWeekRecords'] = $thisWeekRecords;
 
-		usort($data['thisWeekRecords'], function ($a, $b) {
-			$dateA = new DateTime($a['1']);
-			$dateB = new DateTime($b['1']);
-			return $dateA <=> $dateB;
-		});
+		// Only sort if we have valid records (not an error)
+		if (!isset($thisWeekRecords['error']) && !empty($thisWeekRecords)) {
+			usort($data['thisWeekRecords'], function ($a, $b) {
+				$dateA = new DateTime($a['1']);
+				$dateB = new DateTime($b['1']);
+				return $dateA <=> $dateB;
+			});
+		}
 
 		$this->load->view('components/upcoming_dxccs', $data);
 	}
diff --git a/application/controllers/Dxcluster.php b/application/controllers/Dxcluster.php
index 1eb25a275..ef090ec04 100644
--- a/application/controllers/Dxcluster.php
+++ b/application/controllers/Dxcluster.php
@@ -14,6 +14,10 @@ function __construct()
     function index()
     {
         $data['page_title'] = "DX Cluster Spots";
+        
+        // Load radio data for CAT control
+        $this->load->model('cat');
+        $data['radios'] = $this->cat->radios();
 
         /// Load layout
 
@@ -124,4 +128,95 @@ public function qsy() {
             echo json_encode(['success' => false, 'message' => 'Failed to queue QSY command']);
         }
     }
+
+    /*
+     * Check if callsigns have been worked
+     * POST /dxcluster/check_worked
+     */
+    public function check_worked() {
+        header('Content-Type: application/json');
+        
+        $this->load->model('logbook_model');
+        $this->load->model('logbooks_model');
+        
+        // Get JSON input
+        $input = json_decode(file_get_contents("php://input"), true);
+        
+        if (!isset($input['callsigns']) || !is_array($input['callsigns'])) {
+            http_response_code(400);
+            echo json_encode(['success' => false, 'message' => 'Missing or invalid callsigns array']);
+            return;
+        }
+        
+        // Limit batch size to prevent excessive load
+        $max_batch_size = 50;
+        if (count($input['callsigns']) > $max_batch_size) {
+            $input['callsigns'] = array_slice($input['callsigns'], 0, $max_batch_size);
+        }
+        
+        // Get logbook locations for the active logbook
+        $logbook_id = $this->session->userdata('active_station_logbook');
+        $logbooks_locations_array = $this->logbooks_model->list_logbook_relationships($logbook_id);
+        
+        if (!$logbooks_locations_array) {
+            http_response_code(500);
+            echo json_encode(['success' => false, 'message' => 'No logbook locations found']);
+            return;
+        }
+        
+        $results = [];
+        
+        foreach ($input['callsigns'] as $item) {
+            $callsign = $item['callsign'];
+            $band = isset($item['band']) ? $item['band'] : null;
+            
+            // Get DXCC entity for this callsign
+            $dxcc_info = $this->logbook_model->dxcc_lookup($callsign, date('Ymd'));
+            $dxcc = isset($dxcc_info['adif']) ? $dxcc_info['adif'] : null;
+            
+            // Check if worked on this band
+            $worked_on_band = false;
+            if ($band) {
+                $worked_on_band = $this->logbook_model->check_if_callsign_worked_in_logbook($callsign, $logbooks_locations_array, $band) > 0;
+            }
+            
+            // Check if worked on any band
+            $worked_overall = $this->logbook_model->check_if_callsign_worked_in_logbook($callsign, $logbooks_locations_array, null) > 0;
+            
+            // Check if DXCC entity is worked on this band
+            $dxcc_worked_on_band = false;
+            if ($dxcc && $band) {
+                $this->db->select('COL_DXCC');
+                $this->db->where_in('station_id', $logbooks_locations_array);
+                $this->db->where('COL_DXCC', $dxcc);
+                $this->db->where('COL_BAND', $band);
+                $this->db->limit(1);
+                $query = $this->db->get($this->config->item('table_name'));
+                $dxcc_worked_on_band = $query->num_rows() > 0;
+            }
+            
+            // Check if DXCC entity is worked on any band
+            $dxcc_worked_overall = false;
+            if ($dxcc) {
+                $this->db->select('COL_DXCC');
+                $this->db->where_in('station_id', $logbooks_locations_array);
+                $this->db->where('COL_DXCC', $dxcc);
+                $this->db->limit(1);
+                $query = $this->db->get($this->config->item('table_name'));
+                $dxcc_worked_overall = $query->num_rows() > 0;
+            }
+            
+            $results[$callsign] = [
+                'worked_on_band' => $worked_on_band,
+                'worked_overall' => $worked_overall,
+                'band' => $band,
+                'dxcc' => $dxcc,
+                'dxcc_worked_on_band' => $dxcc_worked_on_band,
+                'dxcc_worked_overall' => $dxcc_worked_overall,
+                'country' => isset($dxcc_info['entity']) ? $dxcc_info['entity'] : null
+            ];
+        }
+        
+        echo json_encode(['success' => true, 'results' => $results]);
+    }
 }
\ No newline at end of file
diff --git a/application/controllers/Logbooks.php b/application/controllers/Logbooks.php
index d99baa8b2..1af75f5fc 100644
--- a/application/controllers/Logbooks.php
+++ b/application/controllers/Logbooks.php
@@ -58,6 +58,12 @@ public function edit($id)
 
 		$station_logbook_id = $this->security->xss_clean($id);
 
+		// Check if user has at least write access
+		if (!$this->logbooks_model->check_logbook_is_accessible($station_logbook_id, 'write')) {
+			$this->session->set_flashdata('notice', 'You don\'t have permission to edit this logbook');
+			redirect('logbooks');
+		}
+
 		$station_logbook_details_query = $this->logbooks_model->logbook($station_logbook_id);
 		$data['station_locations_array'] = $this->logbooks_model->list_logbook_relationships($station_logbook_id);
 
@@ -65,6 +71,7 @@ public function edit($id)
 		$data['station_locations_list'] = $this->stations->all_of_user();
 
 		$data['station_locations_linked'] = $this->logbooks_model->list_logbooks_linked($station_logbook_id);
+		$data['is_owner'] = $this->logbooks_model->is_logbook_owner($station_logbook_id);
 		
 		$data['page_title'] = "Edit Station Logbook";
 
@@ -87,7 +94,12 @@ public function edit($id)
 					$this->logbooks_model->create_logbook_location_link($this->input->post('station_logbook_id'), $this->input->post('SelectedStationLocation'));
 				}
 			} else {
-				$this->logbooks_model->edit();
+				// Only owners can rename logbooks
+				if ($this->logbooks_model->is_logbook_owner($this->input->post('station_logbook_id'))) {
+					$this->logbooks_model->edit();
+				} else {
+					$this->session->set_flashdata('notice', 'Only the owner can rename a logbook');
+				}
 			}
 
             redirect('logbooks/edit/'.$this->input->post('station_logbook_id'));
@@ -111,7 +123,28 @@ public function delete($id) {
 
 	public function delete_relationship($logbook_id, $station_id) {
 		$this->load->model('logbooks_model');
-		$this->logbooks_model->delete_relationship($logbook_id, $station_id);
+		$this->load->model('stations');
+		
+		// Check if user has at least write access to the logbook
+		if (!$this->logbooks_model->check_logbook_is_accessible($logbook_id, 'write')) {
+			$this->session->set_flashdata('notice', 'You don\'t have permission to modify this logbook');
+			redirect('logbooks');
+		}
+		
+		// Get station location details
+		$station = $this->stations->profile($station_id);
+		
+		if ($station) {
+			$is_owner = $this->logbooks_model->is_logbook_owner($logbook_id);
+			$owns_station = ($station->user_id == $this->session->userdata('user_id'));
+			
+			// Only allow unlinking if user is logbook owner OR owns the station location
+			if ($is_owner || $owns_station) {
+				$this->logbooks_model->delete_relationship($logbook_id, $station_id);
+			} else {
+				$this->session->set_flashdata('notice', 'You can only unlink your own station locations');
+			}
+		}
 		
 		redirect('logbooks/edit/'.$logbook_id);
 	}
@@ -131,23 +164,49 @@ public function publicslug_validate() {
 
 	public function save_publicsearch() {
 		$this->load->model('logbooks_model');
+		
+		$logbook_id = $this->input->post('logbook_id');
+		
+		// Only owners can modify public settings
+		if (!$this->logbooks_model->is_logbook_owner($logbook_id)) {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">Only the owner can modify public settings</div>";
+			return;
+		}
+		
 		// Handle checkbox - if not checked, it won't be sent, so default to 0
 		$public_search = $this->input->post('public_search') ? 1 : 0;
-		$returndata = $this->logbooks_model->save_public_search($public_search, $this->input->post('logbook_id'));
+		$returndata = $this->logbooks_model->save_public_search($public_search, $logbook_id);
 		echo "<div class=\"alert alert-success\" role=\"alert\">Public Search Settings Saved</div>";
 	}
 
 	public function save_publicradiostatus() {
 		$this->load->model('logbooks_model');
+		
+		$logbook_id = $this->input->post('logbook_id');
+		
+		// Only owners can modify public settings
+		if (!$this->logbooks_model->is_logbook_owner($logbook_id)) {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">Only the owner can modify public settings</div>";
+			return;
+		}
+		
 		// Handle checkbox - if not checked, it won't be sent, so default to 0
 		$public_radio_status = $this->input->post('public_radio_status') ? 1 : 0;
-		$returndata = $this->logbooks_model->save_public_radio_status($public_radio_status, $this->input->post('logbook_id'));
+		$returndata = $this->logbooks_model->save_public_radio_status($public_radio_status, $logbook_id);
 		echo "<div class=\"alert alert-success\" role=\"alert\">Public Radio Status Settings Saved</div>";
 	}
 
 	public function save_publicslug() {
 		$this->load->model('logbooks_model');
 
+		$logbook_id = $this->input->post('logbook_id');
+		
+		// Only owners can modify public settings
+		if (!$this->logbooks_model->is_logbook_owner($logbook_id)) {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">Only the owner can modify public settings</div>";
+			return;
+		}
+
 		$this->load->library('form_validation');
 
 		$this->form_validation->set_rules('public_slug', 'Public Slug', 'required|alpha_numeric');
@@ -164,7 +223,7 @@ public function save_publicslug() {
 			
 	
 			if($result == true) {
-				$returndata = $this->logbooks_model->save_public_slug($this->input->post('public_slug'), $this->input->post('logbook_id'));
+				$returndata = $this->logbooks_model->save_public_slug($this->input->post('public_slug'), $logbook_id);
 				echo "<div class=\"alert alert-success\" role=\"alert\">Public Slug Saved</div>";
 			} else {
 				echo "<div class=\"alert alert-danger\" role=\"alert\">Oops! This Public Slug is unavailable</div>";
@@ -175,7 +234,15 @@ public function save_publicslug() {
 	public function remove_publicslug() {
 		$this->load->model('logbooks_model');
 
-		$this->logbooks_model->remove_public_slug($this->input->post('logbook_id'));
+		$logbook_id = $this->input->post('logbook_id');
+		
+		// Only owners can modify public settings
+		if (!$this->logbooks_model->is_logbook_owner($logbook_id)) {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">Only the owner can modify public settings</div>";
+			return;
+		}
+
+		$this->logbooks_model->remove_public_slug($logbook_id);
 		if ($this->db->affected_rows() > 0) {
 			echo "<div class=\"alert alert-success\" role=\"alert\">Public Slug Removed</div>";
 		} else {
@@ -183,4 +250,137 @@ public function remove_publicslug() {
 		}
 	}
 
+	public function manage_sharing($logbook_id) {
+		// Display sharing management interface
+		$this->load->model('logbooks_model');
+		
+		$clean_id = $this->security->xss_clean($logbook_id);
+		
+		// Check if user has admin access or is owner
+		if (!$this->logbooks_model->is_logbook_owner($clean_id) && 
+			!$this->logbooks_model->check_logbook_is_accessible($clean_id, 'admin')) {
+			$this->session->set_flashdata('notice', 'You\'re not allowed to manage sharing for this logbook!');
+			redirect('logbooks');
+		}
+		
+		$data['logbook'] = $this->logbooks_model->logbook($clean_id)->row();
+		$data['collaborators'] = $this->logbooks_model->list_logbook_collaborators($clean_id);
+		$data['is_owner'] = $this->logbooks_model->is_logbook_owner($clean_id);
+		
+		$data['page_title'] = "Manage Logbook Sharing";
+		$this->load->view('interface_assets/header', $data);
+		$this->load->view('logbooks/manage_sharing');
+		$this->load->view('interface_assets/footer');
+	}
+
+	public function add_user() {
+		// Add a user to a logbook via AJAX/HTMX
+		$this->load->model('logbooks_model');
+		
+		$logbook_id = $this->security->xss_clean($this->input->post('logbook_id'));
+		$user_identifier = $this->security->xss_clean($this->input->post('user_identifier'));
+		$permission_level = $this->security->xss_clean($this->input->post('permission_level'));
+		
+		// Check if current user has admin rights or is owner
+		if (!$this->logbooks_model->is_logbook_owner($logbook_id) && 
+			!$this->logbooks_model->check_logbook_is_accessible($logbook_id, 'admin')) {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">You don't have permission to add users to this logbook</div>";
+			return;
+		}
+		
+		// Try to find user by email first, then by callsign
+		$user_query = $this->user_model->get_by_email($user_identifier);
+		if ($user_query->num_rows() == 0) {
+			$user_query = $this->user_model->get_by_callsign($user_identifier);
+		}
+		
+		if ($user_query->num_rows() == 0) {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">User not found. Please check the email or callsign.</div>";
+			return;
+		}
+		
+		$user = $user_query->row();
+		
+		// Check if user is trying to add themselves
+		if ($user->user_id == $this->session->userdata('user_id')) {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">You cannot add yourself to the logbook.</div>";
+			return;
+		}
+		
+		// Check if user is the owner
+		if ($this->logbooks_model->get_user_permission($logbook_id, $user->user_id) == 'owner') {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">This user is the owner of the logbook.</div>";
+			return;
+		}
+		
+		// Add permission
+		$result = $this->logbooks_model->add_logbook_permission($logbook_id, $user->user_id, $permission_level);
+		
+		if ($result) {
+			// Return updated collaborators list
+			$data['collaborators'] = $this->logbooks_model->list_logbook_collaborators($logbook_id);
+			$data['is_owner'] = $this->logbooks_model->is_logbook_owner($logbook_id);
+			$this->load->view('logbooks/components/collaborators_table', $data);
+		} else {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">Failed to add user. Please try again.</div>";
+		}
+	}
+
+	public function remove_user() {
+		// Remove a user from a logbook via AJAX/HTMX
+		$this->load->model('logbooks_model');
+		
+		$logbook_id = $this->security->xss_clean($this->input->post('logbook_id'));
+		$user_id = $this->security->xss_clean($this->input->post('user_id'));
+		
+		// Check if current user has admin rights or is owner
+		if (!$this->logbooks_model->is_logbook_owner($logbook_id) && 
+			!$this->logbooks_model->check_logbook_is_accessible($logbook_id, 'admin')) {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">You don't have permission to remove users from this logbook</div>";
+			return;
+		}
+		
+		// Remove permission
+		$result = $this->logbooks_model->remove_logbook_permission($logbook_id, $user_id);
+		
+		if ($result) {
+			// Return updated collaborators list
+			$data['collaborators'] = $this->logbooks_model->list_logbook_collaborators($logbook_id);
+			$data['is_owner'] = $this->logbooks_model->is_logbook_owner($logbook_id);
+			$this->load->view('logbooks/components/collaborators_table', $data);
+		} else {
+			echo "<div class=\"alert alert-danger\" role=\"alert\">Failed to remove user. Please try again.</div>";
+		}
+	}
+
+	public function validate_user() {
+		// Validate user exists via AJAX/HTMX
+		$this->load->model('user_model');
+		
+		$user_identifier = $this->security->xss_clean($this->input->post('user_identifier'));
+		
+		if (empty($user_identifier)) {
+			echo '';
+			return;
+		}
+		
+		// Try to find user by email first, then by callsign
+		$user_query = $this->user_model->get_by_email($user_identifier);
+		if ($user_query->num_rows() == 0) {
+			$user_query = $this->user_model->get_by_callsign($user_identifier);
+		}
+		
+		if ($user_query->num_rows() > 0) {
+			$user = $user_query->row();
+			// Check if it's the current user
+			if ($user->user_id == $this->session->userdata('user_id')) {
+				echo '<span class="text-warning"><i class="fas fa-exclamation-triangle"></i> Cannot add yourself</span>';
+			} else {
+				echo '<span class="text-success"><i class="fas fa-check-circle"></i> User found: ' . htmlspecialchars($user->user_callsign) . '</span>';
+			}
+		} else {
+			echo '<span class="text-danger"><i class="fas fa-times-circle"></i> User not found</span>';
+		}
+	}
+
 }
diff --git a/application/controllers/Workabledxcc.php b/application/controllers/Workabledxcc.php
index fda5adb86..3976fa77e 100644
--- a/application/controllers/Workabledxcc.php
+++ b/application/controllers/Workabledxcc.php
@@ -29,11 +29,24 @@ public function index()
 
 	public function dxcclist()
 	{
-		$json = file_get_contents($this->optionslib->get_option('dxped_url'));
+		try {
+			$json = @file_get_contents($this->optionslib->get_option('dxped_url'));
+
+			if ($json === false) {
+				$data['dxcclist'] = array('error' => 'Failed to fetch DXpedition data');
+				$this->load->view('/workabledxcc/components/dxcclist', $data);
+				return;
+			}
+		} catch (Exception $e) {
+			$data['dxcclist'] = array('error' => 'Error fetching DXpedition data: ' . $e->getMessage());
+			$this->load->view('/workabledxcc/components/dxcclist', $data);
+			return;
+		}
+
 		$dataResult = json_decode($json, true);
 
-		if (empty($dataResult)) {
-			$data['dxcclist'] = array();
+		if (empty($dataResult) || !is_array($dataResult)) {
+			$data['dxcclist'] = array('error' => 'Invalid DXpedition data received');
 			$this->load->view('/workabledxcc/components/dxcclist', $data);
 			return;
 		}
diff --git a/application/migrations/234_create_logbook_permissions.php b/application/migrations/234_create_logbook_permissions.php
new file mode 100644
index 000000000..909591641
--- /dev/null
+++ b/application/migrations/234_create_logbook_permissions.php
@@ -0,0 +1,71 @@
+<?php
+
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/*
+*   Create station_logbooks_permissions table for multi-user logbook sharing
+*/
+
+class Migration_create_logbook_permissions extends CI_Migration {
+
+    public function up()
+    {
+        // Check if table already exists
+        if (!$this->db->table_exists('station_logbooks_permissions')) {
+            // Create station_logbooks_permissions table
+            $this->dbforge->add_field(array(
+            'permission_id' => array(
+                'type' => 'BIGINT',
+                'constraint' => 20,
+                'unsigned' => TRUE,
+                'auto_increment' => TRUE
+            ),
+            'logbook_id' => array(
+                'type' => 'BIGINT',
+                'constraint' => 20,
+                'unsigned' => TRUE,
+            ),
+            'user_id' => array(
+                'type' => 'INT',
+                'constraint' => 11,
+            ),
+            'permission_level' => array(
+                'type' => 'ENUM',
+                'constraint' => array('read', 'write', 'admin'),
+                'default' => 'read',
+            ),
+            'created_at' => array(
+                'type' => 'TIMESTAMP',
+                'default' => 'CURRENT_TIMESTAMP',
+            ),
+            'modified' => array(
+                'type' => 'TIMESTAMP',
+                'null' => TRUE,
+            ),
+        ));
+
+            $this->dbforge->add_key('permission_id', TRUE);
+            $this->dbforge->create_table('station_logbooks_permissions');
+
+            // Add unique constraint on logbook_id + user_id combination
+            $this->db->query('CREATE UNIQUE INDEX idx_logbook_user ON station_logbooks_permissions (logbook_id, user_id)');
+            
+            // Add indexes for performance
+            $this->db->query('CREATE INDEX idx_logbook_id ON station_logbooks_permissions (logbook_id)');
+            $this->db->query('CREATE INDEX idx_user_id ON station_logbooks_permissions (user_id)');
+
+            // Add foreign key for logbook_id only (station_logbooks uses InnoDB)
+            // Note: Cannot add foreign key for user_id because users table uses MyISAM engine
+            $this->db->query('ALTER TABLE station_logbooks_permissions 
+                ADD CONSTRAINT fk_slp_logbook 
+                FOREIGN KEY (logbook_id) 
+                REFERENCES station_logbooks(logbook_id) 
+                ON DELETE CASCADE');
+        }
+    }
+
+    public function down()
+    {
+        $this->dbforge->drop_table('station_logbooks_permissions');
+    }
+}
diff --git a/application/migrations/235_tag_2_8_0.php b/application/migrations/235_tag_2_8_0.php
new file mode 100644
index 000000000..4c07a57fe
--- /dev/null
+++ b/application/migrations/235_tag_2_8_0.php
@@ -0,0 +1,30 @@
+<?php
+
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/*
+*   Tag Cloudlog as 2.8.0
+*/
+
+class Migration_tag_2_8_0 extends CI_Migration {
+
+    public function up()
+    {
+
+        // Tag Cloudlog 2.8.0
+        $this->db->where('option_name', 'version');
+        $this->db->update('options', array('option_value' => '2.8.0'));
+
+        // Trigger Version Info Dialog
+        $this->db->where('option_type', 'version_dialog');
+        $this->db->where('option_name', 'confirmed');
+        $this->db->update('user_options', array('option_value' => 'false'));
+
+    }
+
+    public function down()
+    {
+        $this->db->where('option_name', 'version');
+        $this->db->update('options', array('option_value' => '2.7.8'));
+    }
+}
\ No newline at end of file
diff --git a/application/models/Logbooks_model.php b/application/models/Logbooks_model.php
index 48ca149fb..8412a0873 100644
--- a/application/models/Logbooks_model.php
+++ b/application/models/Logbooks_model.php
@@ -3,8 +3,25 @@
 class Logbooks_model extends CI_Model {
 
     function show_all() {
-        $this->db->where('user_id', $this->session->userdata('user_id'));
-		return $this->db->get('station_logbooks');
+		// Get owned logbooks and shared logbooks with access level
+		$user_id = $this->session->userdata('user_id');
+		
+		$this->db->select('station_logbooks.*, 
+			CASE 
+				WHEN station_logbooks.user_id = '.$this->db->escape($user_id).' THEN "owner" 
+				ELSE slp.permission_level 
+			END as access_level', FALSE);
+		$this->db->from('station_logbooks');
+		$this->db->join('station_logbooks_permissions slp', 
+			'slp.logbook_id = station_logbooks.logbook_id AND slp.user_id = '.$this->db->escape($user_id), 
+			'left');
+		$this->db->group_start();
+			$this->db->where('station_logbooks.user_id', $user_id);
+			$this->db->or_where('slp.user_id', $user_id);
+		$this->db->group_end();
+		$this->db->order_by('station_logbooks.logbook_name', 'ASC');
+		
+		return $this->db->get();
 	}
 
 	function CountAllStationLogbooks() {
@@ -104,10 +121,21 @@ function set_logbook_active($id, $user_id = null) {
 	function logbook($id) {
 		// Clean ID
 		$clean_id = $this->security->xss_clean($id);
-
-		$this->db->where('user_id', $this->session->userdata('user_id'));
-		$this->db->where('logbook_id', $clean_id);
-		return $this->db->get('station_logbooks');
+		$user_id = $this->session->userdata('user_id');
+
+		// Get logbook if user owns it OR has shared access
+		$this->db->select('station_logbooks.*');
+		$this->db->from('station_logbooks');
+		$this->db->join('station_logbooks_permissions slp', 
+			'slp.logbook_id = station_logbooks.logbook_id AND slp.user_id = '.$this->db->escape($user_id), 
+			'left');
+		$this->db->where('station_logbooks.logbook_id', $clean_id);
+		$this->db->group_start();
+			$this->db->where('station_logbooks.user_id', $user_id);
+			$this->db->or_where('slp.user_id', $user_id);
+		$this->db->group_end();
+		
+		return $this->db->get();
 	}
 
 	function find_name($id) {
@@ -282,9 +310,16 @@ function list_logbooks_linked($logbook_id) {
 				array_push($relationships_array, $row->station_location_id);
 			}
 
-			$this->db->select('station_profile.*, dxcc_entities.name as station_country, dxcc_entities.end as end');
+			$current_user_id = $this->session->userdata('user_id');
+			
+			$this->db->select('station_profile.*, 
+				dxcc_entities.name as station_country, 
+				dxcc_entities.end as end,
+				users.user_callsign as owner_callsign,
+				CASE WHEN station_profile.user_id = '.$this->db->escape($current_user_id).' THEN 0 ELSE 1 END as is_shared', FALSE);
 			$this->db->where_in('station_id', $relationships_array);
 			$this->db->join('dxcc_entities','station_profile.station_dxcc = dxcc_entities.adif','left outer');
+			$this->db->join('users','station_profile.user_id = users.user_id','left');
 			$query = $this->db->get('station_profile');
 			
 			return $query;
@@ -317,18 +352,176 @@ function delete_relationship($logbook_id, $station_id) {
 		$this->db->delete('station_logbooks_relationship'); 
 	}
 
-	public function check_logbook_is_accessible($id) {
-	    // check if logbook belongs to user
+	public function check_logbook_is_accessible($id, $min_level = 'read') {
+	    // First check if user is the owner (existing behavior - highest priority)
 	    $this->db->select('logbook_id');
 		$this->db->where('user_id', $this->session->userdata('user_id'));
 		$this->db->where('logbook_id', $id);
 		$query = $this->db->get('station_logbooks');
 		if ($query->num_rows() == 1) {
-			return true;
+			return true; // Owner always has full access
 		}
+		
+		// Check if user has shared access via permissions table
+		$this->db->select('permission_level');
+		$this->db->where('logbook_id', $id);
+		$this->db->where('user_id', $this->session->userdata('user_id'));
+		$query = $this->db->get('station_logbooks_permissions');
+		
+		if ($query->num_rows() == 1) {
+			$permission = $query->row()->permission_level;
+			
+			// Map permission levels to hierarchy
+			$levels = array('read' => 1, 'write' => 2, 'admin' => 3);
+			$user_level = isset($levels[$permission]) ? $levels[$permission] : 0;
+			$required_level = isset($levels[$min_level]) ? $levels[$min_level] : 1;
+			
+			return ($user_level >= $required_level);
+		}
+		
 		return false;
 	}
 
+	public function is_logbook_owner($id) {
+		// Check if current user is the owner of the logbook
+		$this->db->select('logbook_id');
+		$this->db->where('user_id', $this->session->userdata('user_id'));
+		$this->db->where('logbook_id', $id);
+		$query = $this->db->get('station_logbooks');
+		return ($query->num_rows() == 1);
+	}
+
+	public function get_user_permission($logbook_id, $user_id) {
+		// Get the permission level for a specific user on a specific logbook
+		// Returns 'owner', permission level, or null
+		
+		// Check if user is owner
+		$this->db->select('logbook_id');
+		$this->db->where('user_id', $user_id);
+		$this->db->where('logbook_id', $logbook_id);
+		$query = $this->db->get('station_logbooks');
+		if ($query->num_rows() == 1) {
+			return 'owner';
+		}
+		
+		// Check permissions table
+		$this->db->select('permission_level');
+		$this->db->where('logbook_id', $logbook_id);
+		$this->db->where('user_id', $user_id);
+		$query = $this->db->get('station_logbooks_permissions');
+		
+		if ($query->num_rows() == 1) {
+			return $query->row()->permission_level;
+		}
+		
+		return null;
+	}
+
+	public function add_logbook_permission($logbook_id, $user_id, $permission_level = 'read') {
+		// Add a user to a logbook with specified permission level
+		// Only owner or admin can add users
+		
+		$clean_logbook_id = $this->security->xss_clean($logbook_id);
+		$clean_user_id = $this->security->xss_clean($user_id);
+		$clean_permission = $this->security->xss_clean($permission_level);
+		
+		// Validate permission level
+		$valid_permissions = array('read', 'write', 'admin');
+		if (!in_array($clean_permission, $valid_permissions)) {
+			return false;
+		}
+		
+		// Check if current user has admin rights or is owner
+		if (!$this->is_logbook_owner($clean_logbook_id) && 
+			!$this->check_logbook_is_accessible($clean_logbook_id, 'admin')) {
+			return false;
+		}
+		
+		// Check if permission already exists
+		$this->db->where('logbook_id', $clean_logbook_id);
+		$this->db->where('user_id', $clean_user_id);
+		$existing = $this->db->get('station_logbooks_permissions');
+		
+		if ($existing->num_rows() > 0) {
+			// Update existing permission
+			$data = array(
+				'permission_level' => $clean_permission,
+				'modified' => date('Y-m-d H:i:s'),
+			);
+			$this->db->where('logbook_id', $clean_logbook_id);
+			$this->db->where('user_id', $clean_user_id);
+			$this->db->update('station_logbooks_permissions', $data);
+		} else {
+			// Insert new permission
+			$data = array(
+				'logbook_id' => $clean_logbook_id,
+				'user_id' => $clean_user_id,
+				'permission_level' => $clean_permission,
+			);
+			$this->db->insert('station_logbooks_permissions', $data);
+		}
+		
+		return true;
+	}
+
+	public function remove_logbook_permission($logbook_id, $user_id) {
+		// Remove a user's access to a logbook
+		// Only owner or admin can remove users
+		
+		$clean_logbook_id = $this->security->xss_clean($logbook_id);
+		$clean_user_id = $this->security->xss_clean($user_id);
+		
+		// Check if current user has admin rights or is owner
+		if (!$this->is_logbook_owner($clean_logbook_id) && 
+			!$this->check_logbook_is_accessible($clean_logbook_id, 'admin')) {
+			return false;
+		}
+		
+		$this->db->where('logbook_id', $clean_logbook_id);
+		$this->db->where('user_id', $clean_user_id);
+		$this->db->delete('station_logbooks_permissions');
+		
+		return true;
+	}
+
+	public function list_logbook_collaborators($logbook_id) {
+		// Get all users with access to a logbook (excluding owner)
+		// Returns array of users with their permission levels
+		
+		$clean_logbook_id = $this->security->xss_clean($logbook_id);
+		
+		// Get owner information
+		$this->db->select('station_logbooks.user_id, users.user_callsign, users.user_email, "owner" as permission_level, "" as created_at');
+		$this->db->from('station_logbooks');
+		$this->db->join('users', 'users.user_id = station_logbooks.user_id');
+		$this->db->where('station_logbooks.logbook_id', $clean_logbook_id);
+		$owner_query = $this->db->get();
+		
+		// Get shared users
+		$this->db->select('slp.user_id, users.user_callsign, users.user_email, slp.permission_level, slp.created_at');
+		$this->db->from('station_logbooks_permissions slp');
+		$this->db->join('users', 'users.user_id = slp.user_id');
+		$this->db->where('slp.logbook_id', $clean_logbook_id);
+		$this->db->order_by('slp.created_at', 'DESC');
+		$shared_query = $this->db->get();
+		
+		$results = array();
+		
+		// Add owner first
+		if ($owner_query->num_rows() > 0) {
+			$results[] = $owner_query->row();
+		}
+		
+		// Add shared users
+		if ($shared_query->num_rows() > 0) {
+			foreach ($shared_query->result() as $row) {
+				$results[] = $row;
+			}
+		}
+		
+		return $results;
+	}
+
 	public function find_active_station_logbook_from_userid($userid) {
 		$this->db->select('active_station_logbook');
 		$this->db->where('user_id', $userid);
diff --git a/application/models/User_model.php b/application/models/User_model.php
index 0407a666f..f0a395458 100644
--- a/application/models/User_model.php
+++ b/application/models/User_model.php
@@ -55,6 +55,17 @@ function get_by_email($email) {
 		return $r;
 	}
 
+	// FUNCTION: object get_by_callsign($callsign)
+	// Retrieve a user by callsign (case-insensitive)
+	function get_by_callsign($callsign) {
+
+		$clean_callsign = $this->security->xss_clean($callsign);
+
+		$this->db->where('UPPER(user_callsign)', strtoupper($clean_callsign));
+		$r = $this->db->get($this->config->item('auth_table'));
+		return $r;
+	}
+
 	/*
 	 * Function: check_email_address
 	 *
diff --git a/application/models/Workabledxcc_model.php b/application/models/Workabledxcc_model.php
index a09e54c32..13380cf41 100644
--- a/application/models/Workabledxcc_model.php
+++ b/application/models/Workabledxcc_model.php
@@ -342,11 +342,23 @@ private function batchConfirmedQuery($entities, $logbooks_locations_array, $conf
 
     public function GetThisWeek()
     {
-        $json = file_get_contents($this->optionslib->get_option('dxped_url'));
+        try {
+            $json = @file_get_contents($this->optionslib->get_option('dxped_url'));
+
+            // Catch any errors from opening the file
+            if ($json === false) {
+                return array('error' => 'Failed to fetch DXpedition data');
+                exit;
+            }
+        } catch (Exception $e) {
+            return array('error' => 'Error fetching DXpedition data: ' . $e->getMessage());
+            exit;
+        }
+
         $data = json_decode($json, true);
 
-        if (empty($data)) {
-            return array();
+        if (empty($data) || !is_array($data)) {
+            return array('error' => 'Invalid DXpedition data received');
         }
 
         $thisWeekRecords = [];
diff --git a/application/views/components/upcoming_dxccs.php b/application/views/components/upcoming_dxccs.php
index 81722036d..836470e39 100644
--- a/application/views/components/upcoming_dxccs.php
+++ b/application/views/components/upcoming_dxccs.php
@@ -1,3 +1,13 @@
+
+<?php
+
+if (isset($thisWeekRecords['error'])) {
+?>
+<div class="alert alert-warning" role="alert">
+    <i class="fas fa-exclamation-triangle"></i> <?php echo $thisWeekRecords['error']; ?>
+</div>
+<?php } else { ?>
+
 <table id="upcoming_dxccs_component" class="table table-striped border-top">
     <tr class="titles">
         <td colspan="3"><i class="fas fa-chart-bar"></i> DXPeditions (This Week)</td>
@@ -13,4 +23,5 @@
         echo '</tr>';
     }
     ?>
-</table>
\ No newline at end of file
+</table>
+<?php } ?>
\ No newline at end of file
diff --git a/application/views/contesting/index.php b/application/views/contesting/index.php
index 544259895..85829d2ea 100644
--- a/application/views/contesting/index.php
+++ b/application/views/contesting/index.php
@@ -1,6 +1,9 @@
 <div class="container qso_panel contesting">
-    <button type="button" class="btn btn-sm btn-warning float-end" onclick="reset_contest_session()"><i class="fas fa-sync-alt"></i> <?php echo lang('contesting_button_reset_contest_session'); ?></button>
-    <h2 style="display:inline"><?php echo lang('contesting_page_title'); ?> </h2> <?php echo ($_GET['manual'] == 0 ? " <span style='display:inline' class='align-text-top badge text-bg-success'>LIVE</span>" : " <span style='display:inline' class='align-text-top badge text-bg-danger'>POST</span>");  ?>
+    <div class="float-end">
+        <button type="button" class="btn btn-sm btn-primary me-2" onclick="openBandmap()" title="Open DX Cluster Bandmap"><i class="fas fa-chart-line"></i> <?php echo lang('menu_bandmap'); ?></button>
+        <button type="button" class="btn btn-sm btn-warning" onclick="reset_contest_session()"><i class="fas fa-sync-alt"></i> <?php echo lang('contesting_button_reset_contest_session'); ?></button>
+    </div>
+    <h2 style="display:inline"><?php echo lang('contesting_page_title'); ?> </h2> <?php echo ($_GET['manual'] == 0 ? " <span style='display:inline; cursor: pointer;' class='align-text-top badge text-bg-success' onclick=\"window.location.href='" . site_url('contesting') . "?manual=1'\" title='Switch to POST mode'>LIVE</span>" : " <span style='display:inline; cursor: pointer;' class='align-text-top badge text-bg-danger' onclick=\"window.location.href='" . site_url('contesting') . "?manual=0'\" title='Switch to LIVE mode'>POST</span>");  ?>
     <div class="row">
 
         <div class="col-sm-12 col-md-12">
@@ -99,6 +102,8 @@
                             </div>
                         </div>
 
+                        <div id="radio_status"></div>
+
                         <div class="row">
                             <div class="mb-3 col-md-3">
                                 <label for="callsign"><?php echo lang('gen_hamradio_callsign'); ?></label>
@@ -219,5 +224,27 @@
         </div>
     </div>
 </div>
-<?php
-?>
+
+<script>
+    function openBandmap() {
+        // Open bandmap in a new window without URL bar, toolbars, etc.
+        const width = 500; 
+        const height = 800;
+        const left = (screen.width - width) / 2;
+        const top = (screen.height - height) / 2;
+        
+        // Note: Modern browsers may still show address bar due to security restrictions
+        // For Chrome, you can use: chrome.exe --app=http://localhost/index.php/dxcluster/bandmap
+        const features = `width=${width},height=${height},left=${left},top=${top},` +
+                       `toolbar=no,location=no,directories=no,status=no,menubar=no,` +
+                       `scrollbars=yes,resizable=yes,copyhistory=no`;
+        
+        const popup = window.open('<?php echo site_url('dxcluster/bandmap'); ?>', 'bandmap', features);
+        
+        // Try to make it fullscreen (user will need to allow this)
+        if (popup) {
+            popup.focus();
+        }
+    }
+</script>
+
diff --git a/application/views/dxcluster/bandmap.php b/application/views/dxcluster/bandmap.php
index dc394c89b..e4a5a85eb 100644
--- a/application/views/dxcluster/bandmap.php
+++ b/application/views/dxcluster/bandmap.php
@@ -191,6 +191,42 @@
         .spot-marker.new {
             animation: spotAppear 0.5s ease-out;
         }
+        
+        /* Worked status styling */
+        .spot-marker.worked-on-band {
+            background: #27ae60;
+            border-color: #229954;
+        }
+        
+        .spot-marker.worked-on-band:hover {
+            background: #2ecc71;
+            border-color: #27ae60;
+        }
+        
+        .spot-marker.worked-other-band {
+            background: #3498db;
+            border-color: #2980b9;
+        }
+        
+        .spot-marker.worked-other-band:hover {
+            background: #5dade2;
+            border-color: #3498db;
+        }
+        
+        .spot-marker.not-worked {
+            background: #e74c3c;
+            border-color: #c0392b;
+        }
+        
+        .spot-marker.new-dxcc {
+            box-shadow: 0 0 10px #f39c12, 0 0 20px #f39c12;
+            border: 2px solid #f39c12;
+        }
+        
+        .spot-marker.new-band-dxcc {
+            box-shadow: 0 0 10px #e74c3c, 0 0 20px #e74c3c;
+            border: 2px solid #e74c3c;
+        }
 
         .tune-indicator {
             position: absolute;
@@ -404,7 +440,7 @@
             
             <div class="stats-display">
                 <div class="stat-item">Band: <span class="stat-value" id="currentBand">20m</span></div>
-                <div class="stat-item">Range: <span class="stat-value" id="freqRange">14.000-14.350</span></div>
+                    <div class="stat-item">Viewing: <span class="stat-value" id="freqRange">14.000-14.350</span> MHz</div>
                 <div class="stat-item">Spots: <span class="stat-value" id="bandSpotCount">0</span></div>
                 <div class="stat-item">Total: <span class="stat-value" id="totalSpots">0</span></div>
             </div>
@@ -422,6 +458,8 @@
     <script>
         let ws;
         let spots = new Map();
+        let workedStatus = {}; // Cache for worked status
+        let checkWorkedTimeout = null;
         let currentBandMeters = 20;
         let bandStart = 14000;
         let bandEnd = 14350;
@@ -492,6 +530,12 @@ function addSpot(spot) {
 
             updateDisplay();
             updateStats();
+            
+            // Check worked status after a short delay (debounce)
+            clearTimeout(checkWorkedTimeout);
+            checkWorkedTimeout = setTimeout(() => {
+                checkWorkedStatus();
+            }, 500);
         }
 
         function handleBandChange() {
@@ -526,16 +570,87 @@ function formatBandName(meters) {
             return `${meters}m`;
         }
         
+        // Determine band from frequency (in kHz)
+        function getBandFromFrequency(freqKhz) {
+            const freq = parseFloat(freqKhz);
+            
+            if (freq >= 1800 && freq <= 2000) return '160m';
+            if (freq >= 3500 && freq <= 4000) return '80m';
+            if (freq >= 5250 && freq <= 5450) return '60m';
+            if (freq >= 7000 && freq <= 7300) return '40m';
+            if (freq >= 10100 && freq <= 10150) return '30m';
+            if (freq >= 14000 && freq <= 14350) return '20m';
+            if (freq >= 18068 && freq <= 18168) return '17m';
+            if (freq >= 21000 && freq <= 21450) return '15m';
+            if (freq >= 24890 && freq <= 24990) return '12m';
+            if (freq >= 28000 && freq <= 29700) return '10m';
+            if (freq >= 50000 && freq <= 54000) return '6m';
+            if (freq >= 70000 && freq <= 71000) return '4m';
+            if (freq >= 144000 && freq <= 148000) return '2m';
+            if (freq >= 420000 && freq <= 450000) return '70cm';
+            if (freq >= 1240000 && freq <= 1300000) return '23cm';
+            if (freq >= 1000000) return 'ghz';
+            
+            return 'unknown';
+        }
+        
+        // Check worked status for callsigns
+        async function checkWorkedStatus() {
+            const callsignsToCheck = [];
+            const seen = new Set();
+            
+            for (let [id, spot] of spots) {
+                if (workedStatus[spot.dx]) continue;
+                if (seen.has(spot.dx)) continue;
+                
+                const band = getBandFromFrequency(spot.frequency);
+                callsignsToCheck.push({
+                    callsign: spot.dx,
+                    band: band
+                });
+                seen.add(spot.dx);
+            }
+            
+            if (callsignsToCheck.length === 0) return;
+            
+            // Limit to 30 callsigns per request
+            const batch = callsignsToCheck.slice(0, 30);
+            
+            try {
+                const response = await fetch('<?php echo site_url('dxcluster/check_worked'); ?>', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json',
+                    },
+                    body: JSON.stringify({ callsigns: batch })
+                });
+                
+                const data = await response.json();
+                
+                if (data.success) {
+                    Object.assign(workedStatus, data.results);
+                    updateDisplay();
+                }
+            } catch (error) {
+                console.error('Error checking worked status:', error);
+            }
+        }
+        
         function selectBand(meters, start, end) {
             currentBandMeters = meters;
-            bandStart = start;
-            bandEnd = end;
+            
+            // Add 5% buffer padding on each end so spots near edges are visible
+            const bandRange = end - start;
+            const padding = bandRange * 0.05;
+            
+            bandStart = start - padding;
+            bandEnd = end + padding;
             
             // Apply default zoom level for better initial view
             const center = (start + end) / 2;
-            const newRange = (end - start) / zoomLevel;
-            viewStart = Math.max(start, center - newRange / 2);
-            viewEnd = Math.min(end, center + newRange / 2);
+            const newRange = (bandEnd - bandStart) / zoomLevel;
+            viewStart = Math.max(bandStart, center - newRange / 2);
+            viewEnd = Math.min(bandEnd, center + newRange / 2);
 
             // Handle band display properly for all bands
             document.getElementById('currentBand').textContent = formatBandName(meters);
@@ -666,6 +781,25 @@ function updateDisplay() {
                     spotElement.classList.add('aged');
                 }
                 
+                // Add worked status styling
+                const status = workedStatus[spot.dx];
+                if (status) {
+                    if (status.worked_on_band) {
+                        spotElement.classList.add('worked-on-band');
+                    } else if (status.worked_overall) {
+                        spotElement.classList.add('worked-other-band');
+                    } else {
+                        spotElement.classList.add('not-worked');
+                    }
+                    
+                    // Add DXCC new badge styling
+                    if (status.dxcc && !status.dxcc_worked_on_band) {
+                        spotElement.classList.add('new-band-dxcc');
+                    } else if (status.dxcc && !status.dxcc_worked_overall) {
+                        spotElement.classList.add('new-dxcc');
+                    }
+                }
+                
                 spotElement.textContent = spot.dx;
                 spotElement.style.top = `${y - 10}px`;
                 spotElement.style.left = `${spotLeft}px`;
@@ -804,7 +938,7 @@ function updateStats() {
         // Mouse wheel scrolling
         bandmapDisplay.addEventListener('wheel', (event) => {
             event.preventDefault();
-            const delta = event.deltaY > 0 ? 1 : -1;
+            const delta = event.deltaY > 0 ? -1 : 1; // Inverted: scroll down = move down freq scale
             const scrollStep = (viewEnd - viewStart) * 0.1;
             
             viewStart += delta * scrollStep;
@@ -820,6 +954,9 @@ function updateStats() {
                 viewEnd = bandEnd;
             }
             
+            // Update frequency range display
+            document.getElementById('freqRange').textContent = `${(viewStart/1000).toFixed(3)}-${(viewEnd/1000).toFixed(3)}`;
+            
             updateDisplay();
         });
 
diff --git a/application/views/dxcluster/index.php b/application/views/dxcluster/index.php
index 94e2401a9..cd2aadef3 100644
--- a/application/views/dxcluster/index.php
+++ b/application/views/dxcluster/index.php
@@ -13,6 +13,66 @@
                     </div>
                 </div>
                 <div class="card-body">
+                    <!-- Filters and Radio Control Panel -->
+                    <div class="card mb-3">
+                        <div class="card-body py-2">
+                            <div id="radio_status"></div>
+                            <div class="d-flex align-items-center gap-3 flex-wrap">
+                                <!-- Radio Selection -->
+                                <div class="d-flex align-items-center">
+                                    <label for="radio" class="form-label mb-0 me-2" style="white-space: nowrap;">
+                                        <i class="fas fa-broadcast-tower"></i> Radio:
+                                    </label>
+                                    <select class="form-select form-select-sm radios" id="radio" name="radio" style="min-width: 150px;">
+                                        <option value="0" selected="selected"><?php echo lang('general_word_none'); ?></option>
+                                        <?php foreach ($radios->result() as $row) { ?>
+                                            <option value="<?php echo $row->id; ?>" <?php if ($this->session->userdata('radio') == $row->id) { echo "selected=\"selected\""; } ?>><?php echo $row->radio; ?></option>
+                                        <?php } ?>
+                                    </select>
+                                </div>
+                                
+                                <!-- Band Filter -->
+                                <div class="d-flex align-items-center">
+                                    <label for="bandFilter" class="form-label mb-0 me-2" style="white-space: nowrap;">
+                                        <i class="fas fa-wave-square"></i> Band:
+                                    </label>
+                                    <select class="form-select form-select-sm" id="bandFilter" style="min-width: 120px;">
+                                        <option value="all">All Bands</option>
+                                        <option value="160m">160m</option>
+                                        <option value="80m">80m</option>
+                                        <option value="60m">60m</option>
+                                        <option value="40m">40m</option>
+                                        <option value="30m">30m</option>
+                                        <option value="20m">20m</option>
+                                        <option value="17m">17m</option>
+                                        <option value="15m">15m</option>
+                                        <option value="12m">12m</option>
+                                        <option value="10m">10m</option>
+                                        <option value="6m">6m</option>
+                                        <option value="4m">4m</option>
+                                        <option value="2m">2m</option>
+                                        <option value="70cm">70cm</option>
+                                        <option value="23cm">23cm</option>
+                                        <option value="ghz">GHz+</option>
+                                    </select>
+                                </div>
+                                
+                                <!-- RBN Filter -->
+                                <div class="form-check">
+                                    <input class="form-check-input" type="checkbox" id="hideRbnSpots" checked>
+                                    <label class="form-check-label" for="hideRbnSpots">
+                                        <i class="fas fa-filter"></i> Hide RBN Spots
+                                    </label>
+                                </div>
+                                
+                                <!-- Info -->
+                                <small class="text-muted ms-auto">
+                                    <i class="fas fa-info-circle"></i> Filters active
+                                </small>
+                            </div>
+                        </div>
+                    </div>
+                    
                     <div class="table-responsive">
                         <table id="dxSpotsTable" class="table table-striped table-hover">
                             <thead class="table-dark">
@@ -31,6 +91,21 @@
                         </table>
                     </div>
                     <div class="mt-3">
+                        <div class="alert alert-info mb-2">
+                            <strong><i class="fas fa-info-circle"></i> Legend:</strong>
+                            <div class="mt-2">
+                                <span class="me-3"><i class="fas fa-check text-success"></i> = Worked on this band</span>
+                                <span class="me-3"><i class="fas fa-check text-info"></i> = Worked on another band</span>
+                                <span class="me-3"><i class="fas fa-times text-secondary"></i> = Not worked</span>
+                            </div>
+                            <div class="mt-1">
+                                <span class="me-3"><span class="badge bg-danger">New Band</span> = New DXCC on this band</span>
+                                <span class="me-3"><span class="badge bg-warning text-dark">New DXCC</span> = New DXCC entity (never worked)</span>
+                            </div>
+                            <div class="mt-2 pt-2 border-top">
+                                <small><i class="fas fa-mouse-pointer"></i> <strong>Tip:</strong> Click any frequency to QSY your radio (if selected above)</small>
+                            </div>
+                        </div>
                         <small class="text-muted">
                             <i class="fas fa-info-circle"></i>
                             Real-time DX cluster spots. Data refreshes automatically via WebSocket connection.
@@ -92,9 +167,83 @@
     let ws = null;
     let spots = new Map();
     let dataTable = null;
+    let hideRbnSpots = true; // Default to hiding RBN spots
+    let selectedBand = 'all'; // Default to all bands
+    let workedStatus = {}; // Cache for worked status
+    let checkWorkedTimeout = null;
     
     const connectionStatus = document.getElementById('connectionStatus');
     const spotsTableBody = document.getElementById('spotsTableBody');
+    const hideRbnCheckbox = document.getElementById('hideRbnSpots');
+    const bandFilterSelect = document.getElementById('bandFilter');
+    
+    // Load RBN filter preference from localStorage
+    const savedRbnPreference = localStorage.getItem('cloudlog_hideRbnSpots');
+    if (savedRbnPreference !== null) {
+        hideRbnSpots = savedRbnPreference === 'true';
+        hideRbnCheckbox.checked = hideRbnSpots;
+    }
+    
+    // Load band filter preference from localStorage
+    const savedBandPreference = localStorage.getItem('cloudlog_bandFilter');
+    if (savedBandPreference !== null) {
+        selectedBand = savedBandPreference;
+        bandFilterSelect.value = selectedBand;
+    }
+    
+    // Listen for checkbox changes
+    hideRbnCheckbox.addEventListener('change', function() {
+        hideRbnSpots = this.checked;
+        localStorage.setItem('cloudlog_hideRbnSpots', hideRbnSpots.toString());
+        updateTable();
+    });
+    
+    // Listen for band filter changes
+    bandFilterSelect.addEventListener('change', function() {
+        selectedBand = this.value;
+        localStorage.setItem('cloudlog_bandFilter', selectedBand);
+        updateTable();
+    });
+    
+    // Check if a spotter is an RBN spot
+    function isRbnSpot(spotter) {
+        if (!spotter) return false;
+        // RBN spots have callsigns like DM5GG-# or DM5GG-1
+        // Match any callsign ending with hyphen followed by # or digits
+        const trimmedSpotter = spotter.trim().toUpperCase();
+        return /\-[#\d]+$/.test(trimmedSpotter);
+    }
+    
+    // Determine band from frequency (in kHz)
+    function getBandFromFrequency(freqKhz) {
+        const freq = parseFloat(freqKhz);
+        
+        if (freq >= 1800 && freq <= 2000) return '160m';
+        if (freq >= 3500 && freq <= 4000) return '80m';
+        if (freq >= 5250 && freq <= 5450) return '60m';
+        if (freq >= 7000 && freq <= 7300) return '40m';
+        if (freq >= 10100 && freq <= 10150) return '30m';
+        if (freq >= 14000 && freq <= 14350) return '20m';
+        if (freq >= 18068 && freq <= 18168) return '17m';
+        if (freq >= 21000 && freq <= 21450) return '15m';
+        if (freq >= 24890 && freq <= 24990) return '12m';
+        if (freq >= 28000 && freq <= 29700) return '10m';
+        if (freq >= 50000 && freq <= 54000) return '6m';
+        if (freq >= 70000 && freq <= 71000) return '4m';
+        if (freq >= 144000 && freq <= 148000) return '2m';
+        if (freq >= 420000 && freq <= 450000) return '70cm';
+        if (freq >= 1240000 && freq <= 1300000) return '23cm';
+        if (freq >= 1000000) return 'ghz'; // 1 GHz and above
+        
+        return 'unknown';
+    }
+    
+    // Check if spot matches selected band filter
+    function matchesBandFilter(freqKhz) {
+        if (selectedBand === 'all') return true;
+        const spotBand = getBandFromFrequency(freqKhz);
+        return spotBand === selectedBand;
+    }
     
     // Initialize DataTable
     dataTable = $('#dxSpotsTable').DataTable({
@@ -107,12 +256,51 @@
         columnDefs: [
             {
                 targets: 0, // Time column
+                width: '8%',
                 render: function(data, type, row) {
                     return data;
                 }
             },
+            {
+                targets: 1, // DX Call column
+                width: '35%',
+                render: function(data, type, row) {
+                    if (type === 'display') {
+                        const callsign = data;
+                        const status = workedStatus[callsign];
+                        let html = `<span class="dx-callsign" data-callsign="${callsign}">${callsign}</span>`;
+                        
+                        if (status) {
+                            // Country name badge
+                            if (status.country) {
+                                html += `<span class="badge bg-secondary ms-2" title="Country: ${status.country}">${status.country}</span>`;
+                            }
+                            
+                            // Worked status icon
+                            if (status.worked_on_band) {
+                                html += `<i class="fas fa-check text-success ms-2" title="Worked on ${status.band}"></i>`;
+                            } else if (status.worked_overall) {
+                                html += `<i class="fas fa-check text-info ms-2" title="Worked on another band"></i>`;
+                            } else {
+                                html += `<i class="fas fa-times text-secondary ms-2" title="Not worked yet"></i>`;
+                            }
+                            
+                            // New country badges
+                            if (status.dxcc && !status.dxcc_worked_on_band) {
+                                html += `<span class="badge bg-danger ms-2" title="New DXCC entity on this band">New Band</span>`;
+                            } else if (status.dxcc && !status.dxcc_worked_overall) {
+                                html += `<span class="badge bg-warning text-dark ms-2" title="New DXCC entity">New DXCC</span>`;
+                            }
+                        }
+                        
+                        return html;
+                    }
+                    return data;
+                }
+            },
             {
                 targets: 2, // Frequency column
+                width: '12%',
                 className: 'frequency-cell',
                 render: function(data, type, row) {
                     if (type === 'display') {
@@ -121,8 +309,17 @@ className: 'frequency-cell',
                     return data;
                 }
             },
+            {
+                targets: 3, // Spotter column
+                width: '10%'
+            },
+            {
+                targets: 4, // Comment column
+                width: '25%'
+            },
             {
                 targets: 5, // Age column
+                width: '10%',
                 render: function(data, type, row) {
                     if (type === 'display') {
                         return `<span class="spot-age">${data}</span>`;
@@ -185,6 +382,65 @@ function addSpot(spot) {
         updateTable();
     }
     
+    // Check worked status for callsigns
+    async function checkWorkedStatus() {
+        // Get unique callsigns from visible spots
+        const callsignsToCheck = [];
+        const spotArray = Array.from(spots.values());
+        const seen = new Set();
+        
+        spotArray.forEach(spot => {
+            // Skip if already checked or if filtered out
+            if (workedStatus[spot.dx]) return;
+            if (hideRbnSpots && isRbnSpot(spot.spotter)) return;
+            if (!matchesBandFilter(spot.frequency)) return;
+            if (seen.has(spot.dx)) return; // Avoid duplicates
+            
+            const band = getBandFromFrequency(spot.frequency);
+            callsignsToCheck.push({
+                callsign: spot.dx,
+                band: band
+            });
+            seen.add(spot.dx);
+        });
+        
+        console.log('Checking worked status for:', callsignsToCheck.length, 'callsigns');
+        
+        if (callsignsToCheck.length === 0) return;
+        
+        // Limit to 30 callsigns per request to reduce load
+        const batch = callsignsToCheck.slice(0, 30);
+        
+        try {
+            const response = await fetch('<?php echo site_url('dxcluster/check_worked'); ?>', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                },
+                body: JSON.stringify({ callsigns: batch })
+            });
+            
+            const data = await response.json();
+            console.log('Worked status response:', data);
+            
+            if (data.success) {
+                // Update worked status cache
+                Object.assign(workedStatus, data.results);
+                
+                // Redraw table to show badges
+                updateTable();
+            }
+        } catch (error) {
+            console.error('Error checking worked status:', error);
+        }
+    }
+    
+    // Update worked status badges in the table (legacy function - now handled in render)
+    function updateWorkedBadges() {
+        // No longer needed - badges are rendered directly in DataTable column render function
+        console.log('Badges updated via table redraw');
+    }
+    
     function updateTable() {
         // Clear existing data
         dataTable.clear();
@@ -194,8 +450,18 @@ function updateTable() {
             return b.receivedAt - a.receivedAt;
         });
         
-        // Add spots to table
+        // Filter and add spots to table
         spotArray.forEach(spot => {
+            // Skip RBN spots if filter is enabled
+            if (hideRbnSpots && isRbnSpot(spot.spotter)) {
+                return;
+            }
+            
+            // Skip spots that don't match band filter
+            if (!matchesBandFilter(spot.frequency)) {
+                return;
+            }
+            
             const age = calculateAge(spot.receivedAt);
             const timeFormatted = formatTime(spot.time);
             const frequencyFormatted = `${parseFloat(spot.frequency).toFixed(1)} kHz`;
@@ -218,6 +484,12 @@ function updateTable() {
         setTimeout(() => {
             applyAgeBasedStyling();
         }, 100);
+        
+        // Check worked status after a short delay (debounce)
+        clearTimeout(checkWorkedTimeout);
+        checkWorkedTimeout = setTimeout(() => {
+            checkWorkedStatus();
+        }, 500);
     }
     
     function formatTime(timeString) {
@@ -283,37 +555,67 @@ function applyAgeBasedStyling() {
 });
 
 function handleFrequencyClick(frequency) {
-    // You can implement frequency tuning functionality here
-    // For example, send to radio or copy to clipboard
-    console.log('Frequency clicked:', frequency);
+    const radioId = document.getElementById('radio').value;
     
-    // Copy to clipboard as example
-    if (navigator.clipboard) {
-        const freqInMHz = (parseFloat(frequency) / 1000).toFixed(3);
-        navigator.clipboard.writeText(freqInMHz).then(() => {
-            // Show a temporary notification
-            const toast = document.createElement('div');
-            toast.className = 'toast align-items-center text-white bg-primary border-0 position-fixed top-0 end-0 m-3';
-            toast.setAttribute('role', 'alert');
-            toast.style.zIndex = '9999';
-            toast.innerHTML = `
-                <div class="d-flex">
-                    <div class="toast-body">
-                        Frequency ${freqInMHz} MHz copied to clipboard
-                    </div>
-                    <button type="button" class="btn-close btn-close-white me-2 m-auto" data-bs-dismiss="toast"></button>
-                </div>
-            `;
-            document.body.appendChild(toast);
-            
-            const bsToast = new bootstrap.Toast(toast);
-            bsToast.show();
-            
-            setTimeout(() => {
-                toast.remove();
-            }, 3000);
-        });
+    if (radioId === '0') {
+        // No radio selected - copy to clipboard
+        if (navigator.clipboard) {
+            const freqInMHz = (parseFloat(frequency) / 1000).toFixed(3);
+            navigator.clipboard.writeText(freqInMHz).then(() => {
+                showToast('Frequency ' + freqInMHz + ' MHz copied to clipboard', 'info');
+            });
+        }
+        return;
     }
+    
+    // QSY the radio
+    const freqInMHz = (parseFloat(frequency) / 1000).toFixed(3);
+    
+    fetch('<?php echo site_url('dxcluster/qsy'); ?>', {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+            radio_id: radioId,
+            frequency: freqInMHz
+        })
+    })
+    .then(response => response.json())
+    .then(data => {
+        if (data.success) {
+            showToast('QSY command sent to radio: ' + freqInMHz + ' MHz', 'success');
+        } else {
+            showToast('Failed to QSY radio: ' + data.message, 'danger');
+        }
+    })
+    .catch(error => {
+        console.error('Error sending QSY command:', error);
+        showToast('Error sending QSY command', 'danger');
+    });
+}
+
+function showToast(message, type = 'primary') {
+    const toast = document.createElement('div');
+    toast.className = `toast align-items-center text-white bg-${type} border-0 position-fixed top-0 end-0 m-3`;
+    toast.setAttribute('role', 'alert');
+    toast.style.zIndex = '9999';
+    toast.innerHTML = `
+        <div class="d-flex">
+            <div class="toast-body">
+                ${message}
+            </div>
+            <button type="button" class="btn-close btn-close-white me-2 m-auto" data-bs-dismiss="toast"></button>
+        </div>
+    `;
+    document.body.appendChild(toast);
+    
+    const bsToast = new bootstrap.Toast(toast);
+    bsToast.show();
+    
+    setTimeout(() => {
+        toast.remove();
+    }, 3000);
 }
 
 // Helper function for DataTables language URL (if it exists in Cloudlog)
diff --git a/application/views/emeinitials/index.php b/application/views/emeinitials/index.php
index b85a9f711..a976be14f 100644
--- a/application/views/emeinitials/index.php
+++ b/application/views/emeinitials/index.php
@@ -63,7 +63,11 @@
          $result = write_initials_data($timeline_array, $custom_date_format, $bandselect, $modeselect);
     }
     else {
-        echo '<div class="alert alert-danger" role="alert">Nothing found!</div>';
+        echo '<div class="alert alert-info" role="alert">';
+        echo '<h5 class="alert-heading">No EME Initials Found</h5>';
+        echo '<p>You haven\'t worked any callsigns via EME (Earth-Moon-Earth) yet. EME Initials tracks the first time you work a callsign starting with each letter of the alphabet using moon bounce.</p>';
+        echo '<p class="mb-0">Start logging your EME contacts to build your initials collection!</p>';
+        echo '</div>';
     }
     ?>
 
diff --git a/application/views/interface_assets/header.php b/application/views/interface_assets/header.php
index 8fdfd653a..2e506ddac 100644
--- a/application/views/interface_assets/header.php
+++ b/application/views/interface_assets/header.php
@@ -98,13 +98,9 @@
 							<div class="dropdown-menu" aria-labelledby="navbarDropdown">
 								<a class="dropdown-item" href="<?php echo site_url('qso?manual=0'); ?>" title="Log Live QSOs"><i class="fas fa-list-ul"></i> <?php echo lang('menu_live_qso'); ?></a>
 								<div class="dropdown-divider"></div>
-								<a class="dropdown-item" href="<?php echo site_url('qso?manual=1'); ?>" title="Log QSO made in the past"><i class="fas fa-list"></i> <?php echo lang('menu_post_qso'); ?></a>
-								<div class="dropdown-divider"></div>
 								<a class="dropdown-item" href="<?php echo site_url('simplefle'); ?>" title="Simple Fast Log Entry"><i class="fas fa-list-alt"></i> <?php echo lang('menu_fast_log_entry'); ?></a>
 								<div class="dropdown-divider"></div>
 								<a class="dropdown-item" href="<?php echo site_url('contesting?manual=0'); ?>" title="Live contest QSOs"><i class="fas fa-list-ol"></i> <?php echo lang('menu_live_contest_logging'); ?></a>
-								<div class="dropdown-divider"></div>
-								<a class="dropdown-item" href="<?php echo site_url('contesting?manual=1'); ?>" title="Post contest QSOs"><i class="fas fa-list-ol"></i> <?php echo lang('menu_post_contest_logging'); ?></a>
 							</div>
 						</li>
 
diff --git a/application/views/logbooks/components/collaborators_table.php b/application/views/logbooks/components/collaborators_table.php
new file mode 100644
index 000000000..8c63f3e2b
--- /dev/null
+++ b/application/views/logbooks/components/collaborators_table.php
@@ -0,0 +1,77 @@
+<?php if (count($collaborators) > 0) { ?>
+<div class="table-responsive">
+    <table class="table table-hover mb-0">
+        <thead class="table-light">
+            <tr>
+                <th scope="col"><i class="fas fa-user me-1"></i>User</th>
+                <th scope="col"><i class="fas fa-envelope me-1"></i>Email</th>
+                <th scope="col" class="text-center"><i class="fas fa-shield-alt me-1"></i>Permission</th>
+                <th scope="col" class="text-center"><i class="fas fa-calendar me-1"></i>Added</th>
+                <?php if ($is_owner) { ?>
+                <th scope="col" class="text-center"><i class="fas fa-tools me-1"></i>Actions</th>
+                <?php } ?>
+            </tr>
+        </thead>
+        <tbody>
+            <?php foreach ($collaborators as $user) { ?>
+            <tr>
+                <td class="align-middle">
+                    <strong><?php echo htmlspecialchars($user->user_callsign); ?></strong>
+                    <?php if ($user->permission_level == 'owner') { ?>
+                        <span class="badge bg-primary ms-2">
+                            <i class="fas fa-crown me-1"></i>Owner
+                        </span>
+                    <?php } ?>
+                </td>
+                <td class="align-middle">
+                    <?php echo htmlspecialchars($user->user_email); ?>
+                </td>
+                <td class="align-middle text-center">
+                    <?php if ($user->permission_level == 'owner') { ?>
+                        <span class="badge bg-primary">Owner</span>
+                    <?php } elseif ($user->permission_level == 'admin') { ?>
+                        <span class="badge bg-danger">Admin</span>
+                    <?php } elseif ($user->permission_level == 'write') { ?>
+                        <span class="badge bg-warning">Write</span>
+                    <?php } else { ?>
+                        <span class="badge bg-secondary">Read</span>
+                    <?php } ?>
+                </td>
+                <td class="align-middle text-center">
+                    <?php if ($user->created_at && $user->created_at != '') { ?>
+                        <?php echo date('Y-m-d', strtotime($user->created_at)); ?>
+                    <?php } else { ?>
+                        <span class="text-muted">-</span>
+                    <?php } ?>
+                </td>
+                <?php if ($is_owner) { ?>
+                <td class="align-middle text-center">
+                    <?php if ($user->permission_level != 'owner') { ?>
+                        <form hx-post="<?php echo site_url('logbooks/remove_user'); ?>" 
+                              hx-target="#collaboratorsContainer" 
+                              hx-swap="innerHTML"
+                              hx-confirm="Are you sure you want to remove this user's access?"
+                              style="display:inline;">
+                            <input type="hidden" name="logbook_id" value="<?php echo $this->uri->segment(3); ?>">
+                            <input type="hidden" name="user_id" value="<?php echo $user->user_id; ?>">
+                            <button type="submit" class="btn btn-danger btn-sm" title="Remove User">
+                                <i class="fas fa-user-times"></i>
+                            </button>
+                        </form>
+                    <?php } else { ?>
+                        <span class="text-muted">-</span>
+                    <?php } ?>
+                </td>
+                <?php } ?>
+            </tr>
+            <?php } ?>
+        </tbody>
+    </table>
+</div>
+<?php } else { ?>
+<div class="text-center py-5">
+    <i class="fas fa-users text-muted mb-3" style="font-size: 3rem;"></i>
+    <h5 class="text-muted mb-3">No Collaborators</h5>
+    <p class="text-muted">This logbook hasn't been shared with anyone yet.</p>
+</div>
+<?php } ?>
diff --git a/application/views/logbooks/edit.php b/application/views/logbooks/edit.php
index 46f23f3e4..02f239468 100644
--- a/application/views/logbooks/edit.php
+++ b/application/views/logbooks/edit.php
@@ -28,18 +28,23 @@
 
 						<div class="mb-3">
 							<label for="stationLogbookNameInput"><?php echo lang('station_logbooks_create_name'); ?></label>
-							<input type="text" class="form-control" name="station_logbook_name" id="stationLogbookNameInput" aria-describedby="stationLogbookNameInputHelp" value="<?php if(set_value('station_logbook_name') != "") { echo set_value('station_logbook_name'); } else { echo $station_logbook_details->logbook_name; } ?>" required>
-							<small id="stationLogbookNameInputHelp" class="form-text text-muted"><?php echo lang('station_logbooks_edit_name_hint'); ?></small>
+							<input type="text" class="form-control" name="station_logbook_name" id="stationLogbookNameInput" aria-describedby="stationLogbookNameInputHelp" value="<?php if(set_value('station_logbook_name') != "") { echo set_value('station_logbook_name'); } else { echo $station_logbook_details->logbook_name; } ?>" <?php echo isset($is_owner) && !$is_owner ? 'readonly' : 'required'; ?>>
+							<small id="stationLogbookNameInputHelp" class="form-text text-muted"><?php echo isset($is_owner) && !$is_owner ? lang('station_logbooks_edit_name_hint').' '.lang('station_logbooks_shared_readonly') : lang('station_logbooks_edit_name_hint'); ?></small>
 						</div>
 
 						<input type="hidden" class="form-control" name="station_logbook_id" value="<?php echo $station_logbook_details->logbook_id; ?>" required>	
 
+						<?php if(isset($is_owner) && $is_owner) { ?>
 						<button type="submit" class="btn btn-primary"><i class="fas fa-plus-square"></i> <?php echo lang('station_logbooks_edit_name_update'); ?></button>
+						<?php } else { ?>
+						<p class="text-muted"><i class="fas fa-info-circle"></i> Only the owner can rename this logbook</p>
+						<?php } ?>
 					</form>
 				</div>
 			</div>
 		</div>
 
+		<?php if(isset($is_owner) && $is_owner) { ?>
 		<div class="col-md">
 			<div class="card">
 				<div class="card-header"><?php echo lang('station_logbooks_public_slug'); ?></div>
@@ -110,6 +115,7 @@
 				</div>
 			</div>
 		</div>
+		<?php } ?>
 	</div>
 
 	<div class="row">
@@ -161,6 +167,7 @@
 						<th scope="col"><?php echo lang('station_location_name'); ?></th>
 						<th scope="col"><?php echo lang('station_location_callsign'); ?></th>
 						<th scope="col"><?php echo lang('gen_hamradio_dxcc'); ?></th>
+						<th scope="col">Owner</th>
 						<th scope="col"><?php echo lang('station_logbooks_unlink_station_location'); ?></th>
 					</tr>
 				</thead>
@@ -173,17 +180,30 @@
 						<td style="text-align: center; vertical-align: middle;"><?php echo $row->station_profile_name;?></td>
 						<td style="text-align: center; vertical-align: middle;"><?php echo $row->station_callsign;?></td>
 						<td style="text-align: center; vertical-align: middle;"><?php echo $row->station_country; if ($row->end != NULL) { echo ' <span class="badge text-bg-danger">'.lang('gen_hamradio_deleted_dxcc').'</span>'; } ?></td>
-						<td style="text-align: center; vertical-align: middle;"><a href="<?php echo site_url('logbooks/delete_relationship/'); ?><?php echo $station_logbook_details->logbook_id; ?>/<?php echo $row->station_id;?>" class="btn btn-danger"><i class="fas fa-unlink"></i></a></td>
+						<td style="text-align: center; vertical-align: middle;">
+							<?php if ($row->is_shared == 1) { ?>
+								<span class="badge bg-info text-dark"><i class="fas fa-share-alt"></i> Shared (<?php echo $row->owner_callsign; ?>)</span>
+							<?php } else { ?>
+								<span class="badge bg-success"><i class="fas fa-user"></i> Yours</span>
+							<?php } ?>
+						</td>
+						<td style="text-align: center; vertical-align: middle;">
+							<?php 
+							// Only show unlink button if user is owner of logbook OR owner of this station location
+							if (isset($is_owner) && ($is_owner || $row->is_shared == 0)) { 
+							?>
+								<a href="<?php echo site_url('logbooks/delete_relationship/'); ?><?php echo $station_logbook_details->logbook_id; ?>/<?php echo $row->station_id;?>" class="btn btn-danger"><i class="fas fa-unlink"></i></a>
+							<?php } else { ?>
+								<span class="text-muted"><i class="fas fa-lock"></i></span>
+							<?php } ?>
+						</td>
 					</tr>
 					<?php
 							}
 						} else {
 					?>
 					<tr>
-						<td style="text-align: center; vertical-align: middle;" colspan="2"><?php echo lang('station_logbooks_no_linked_loc'); ?></td>
-						<td style="text-align: center; vertical-align: middle;"></td>
-						<td style="text-align: center; vertical-align: middle;"></td>
-						<td style="text-align: center; vertical-align: middle;"></td>
+						<td style="text-align: center; vertical-align: middle;" colspan="5"><?php echo lang('station_logbooks_no_linked_loc'); ?></td>
 					</tr>
 					<?php } ?>
 				</tbody>
diff --git a/application/views/logbooks/index.php b/application/views/logbooks/index.php
index 7ae845204..119f863fd 100644
--- a/application/views/logbooks/index.php
+++ b/application/views/logbooks/index.php
@@ -72,6 +72,11 @@
                                                     <i class="fas fa-check me-1"></i><?php echo lang('station_logbooks_active_logbook'); ?>
                                                 </span>
                                             <?php } ?>
+                                            <?php if(isset($row->access_level) && $row->access_level != 'owner') { ?>
+                                                <span class="badge bg-info ms-2" title="Shared logbook">
+                                                    <i class="fas fa-users me-1"></i>Shared (<?php echo ucfirst($row->access_level); ?>)
+                                                </span>
+                                            <?php } ?>
                                         </div>
                                     </div>
                                 </td>
@@ -117,7 +122,14 @@ class="btn btn-primary btn-sm"
                                            title="<?php echo lang('station_logbooks_edit_logbook') . ': ' . $row->logbook_name;?>">
                                             <i class="fas fa-edit"></i>
                                         </a>
-                                        <?php if($this->session->userdata('active_station_logbook') != $row->logbook_id) { ?>
+                                        <?php if($row->user_id == $this->session->userdata('user_id') || (isset($row->access_level) && $row->access_level == 'admin')) { ?>
+                                            <a href="<?php echo site_url('logbooks/manage_sharing')."/".$row->logbook_id; ?>" 
+                                               class="btn btn-info btn-sm" 
+                                               title="Manage Sharing">
+                                                <i class="fas fa-users"></i>
+                                            </a>
+                                        <?php } ?>
+                                        <?php if($this->session->userdata('active_station_logbook') != $row->logbook_id && $row->user_id == $this->session->userdata('user_id')) { ?>
                                             <a href="<?php echo site_url('Logbooks/delete')."/".$row->logbook_id; ?>" 
                                                class="btn btn-danger btn-sm" 
                                                title="<?php echo lang('admin_delete')?>"
diff --git a/application/views/logbooks/manage_sharing.php b/application/views/logbooks/manage_sharing.php
new file mode 100644
index 000000000..6727000aa
--- /dev/null
+++ b/application/views/logbooks/manage_sharing.php
@@ -0,0 +1,108 @@
+<div class="container logbook-sharing">
+
+<br>
+
+<!-- Page Header -->
+<div class="row mb-4">
+    <div class="col-md-12">
+        <div class="d-flex justify-content-between align-items-center">
+            <div>
+                <h2><i class="fas fa-users me-2"></i>Manage Logbook Sharing</h2>
+                <p class="text-muted mb-0">Share "<?php echo $logbook->logbook_name; ?>" with other users</p>
+            </div>
+            <a href="<?php echo site_url('logbooks'); ?>" class="btn btn-secondary">
+                <i class="fas fa-arrow-left me-2"></i>Back to Logbooks
+            </a>
+        </div>
+    </div>
+</div>
+
+<!-- Information Card -->
+<div class="row mb-4">
+    <div class="col-md-12">
+        <div class="card">
+            <div class="card-header bg-light">
+                <h5 class="mb-0"><i class="fas fa-info-circle me-2"></i>About Sharing</h5>
+            </div>
+            <div class="card-body">
+                <p class="mb-2"><strong>Permission Levels:</strong></p>
+                <ul class="mb-0">
+                    <li><strong>Read:</strong> View logbook data and QSOs only</li>
+                    <li><strong>Write:</strong> Add, edit, and delete QSOs, manage station locations</li>
+                    <li><strong>Admin:</strong> All write permissions plus the ability to manage other users' access</li>
+                </ul>
+            </div>
+        </div>
+    </div>
+</div>
+
+<!-- Add User Form -->
+<?php if ($is_owner) { ?>
+<div class="row mb-4">
+    <div class="col-md-12">
+        <div class="card">
+            <div class="card-header bg-light">
+                <h5 class="mb-0"><i class="fas fa-user-plus me-2"></i>Add User</h5>
+            </div>
+            <div class="card-body">
+                <form id="addUserForm" hx-post="<?php echo site_url('logbooks/add_user'); ?>" 
+                      hx-target="#collaboratorsContainer" 
+                      hx-swap="innerHTML">
+                    <input type="hidden" name="logbook_id" value="<?php echo $logbook->logbook_id; ?>">
+                    
+                    <div class="row g-3">
+                        <div class="col-md-5">
+                            <label for="user_identifier" class="form-label">Email or Callsign</label>
+                            <input type="text" 
+                                   class="form-control" 
+                                   id="user_identifier" 
+                                   name="user_identifier" 
+                                   placeholder="Enter user's email or callsign"
+                                   hx-post="<?php echo site_url('logbooks/validate_user'); ?>"
+                                   hx-trigger="keyup changed delay:500ms"
+                                   hx-target="#userValidationFeedback"
+                                   hx-include="[name='user_identifier']"
+                                   required>
+                            <div id="userValidationFeedback" class="mt-1"></div>
+                            <small class="text-muted">User must have an account in Cloudlog</small>
+                        </div>
+                        
+                        <div class="col-md-4">
+                            <label for="permission_level" class="form-label">Permission Level</label>
+                            <select class="form-select" id="permission_level" name="permission_level" required>
+                                <option value="read">Read Only</option>
+                                <option value="write" selected>Write</option>
+                                <option value="admin">Admin</option>
+                            </select>
+                        </div>
+                        
+                        <div class="col-md-3 d-flex align-items-end">
+                            <button type="submit" class="btn btn-primary w-100">
+                                <i class="fas fa-user-plus me-2"></i>Add User
+                            </button>
+                        </div>
+                    </div>
+                </form>
+            </div>
+        </div>
+    </div>
+</div>
+<?php } ?>
+
+<!-- Current Access List -->
+<div class="row">
+    <div class="col-md-12">
+        <div class="card">
+            <div class="card-header bg-light">
+                <h5 class="mb-0"><i class="fas fa-list me-2"></i>Current Access (<?php echo count($collaborators); ?>)</h5>
+            </div>
+            <div class="card-body p-0">
+                <div id="collaboratorsContainer">
+                    <?php $this->load->view('logbooks/components/collaborators_table', array('collaborators' => $collaborators, 'is_owner' => $is_owner)); ?>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+</div>
diff --git a/application/views/qso/edit_ajax.php b/application/views/qso/edit_ajax.php
index 737d40e86..9af6711ba 100644
--- a/application/views/qso/edit_ajax.php
+++ b/application/views/qso/edit_ajax.php
@@ -255,12 +255,14 @@
                             <div class="tab-pane fade" id="nav-satellites" role="tabpanel" aria-labelledby="nav-satellites-tab">
                                 <div class="mb-3">
                                     <label for="sat_name">Sat Name</label>
-                                    <input type="text" class="form-control form-control-sm" name="sat_name" id="sat_name" value="<?php echo $qso->COL_SAT_NAME; ?>">
+                                    <input list="satellite_names_edit" type="text" class="form-control form-control-sm" name="sat_name" id="sat_name_edit" value="<?php echo $qso->COL_SAT_NAME; ?>">
+                                    <datalist id="satellite_names_edit" class="satellite_names_list_edit"></datalist>
                                 </div>
 
                                 <div class="mb-3">
                                     <label for="sat_mode">Sat Mode</label>
-                                    <input type="text" class="form-control form-control-sm" name="sat_mode" id="sat_mode" value="<?php echo $qso->COL_SAT_MODE; ?>">
+                                    <input list="satellite_modes_edit" type="text" class="form-control form-control-sm" name="sat_mode" id="sat_mode_edit" value="<?php echo $qso->COL_SAT_MODE; ?>">
+                                    <datalist id="satellite_modes_edit" class="satellite_modes_list_edit"></datalist>
                                 </div>
                             </div>
 
diff --git a/application/views/qso/index.php b/application/views/qso/index.php
index bb2a11424..96fec6495 100755
--- a/application/views/qso/index.php
+++ b/application/views/qso/index.php
@@ -17,10 +17,10 @@
             <ul style="font-size: 15px;" class="nav nav-tabs card-header-tabs pull-right" id="myTab" role="tablist">
               <li class="nav-item">
                 <a class="nav-link active" id="qsp-tab" data-bs-toggle="tab" href="#qso" role="tab" aria-controls="qso" aria-selected="true"><?php echo lang('gen_hamradio_qso'); ?><?php if ($_GET['manual'] == 0) {
-                                                                                                                                                                                      echo " <span class=\"badge text-bg-success\">LIVE</span>";
+                                                                                                                                                                                      echo " <span class=\"badge text-bg-success\" style=\"cursor: pointer;\" onclick=\"window.location.href='" . site_url('qso') . "?manual=1'\" title=\"Switch to POST mode\">LIVE</span>";
                                                                                                                                                                                     };
                                                                                                                                                                                     if ($_GET['manual'] == 1) {
-                                                                                                                                                                                      echo " <span class=\"badge text-bg-danger\">POST</span>";
+                                                                                                                                                                                      echo " <span class=\"badge text-bg-danger\" style=\"cursor: pointer;\" onclick=\"window.location.href='" . site_url('qso') . "?manual=0'\" title=\"Switch to LIVE mode\">POST</span>";
                                                                                                                                                                                     } ?></a>
               </li>
 
diff --git a/application/views/workabledxcc/components/dxcclist.php b/application/views/workabledxcc/components/dxcclist.php
index 5eda33d2f..0e5f4938b 100644
--- a/application/views/workabledxcc/components/dxcclist.php
+++ b/application/views/workabledxcc/components/dxcclist.php
@@ -1,6 +1,15 @@
 <p>Data is collected by Cloudlog from multiple sources.</p>
 
 <?php
+if (isset($dxcclist['error'])) {
+?>
+<div class="alert alert-warning" role="alert">
+    <i class="fas fa-exclamation-triangle"></i> <?php echo $dxcclist['error']; ?>
+</div>
+<?php
+    return;
+}
+
 $grouped = [];
 
 // Step 2: Iterate over $dxcclist.
diff --git a/assets/js/sections/common.js b/assets/js/sections/common.js
index 10bfee506..c05aa4af0 100644
--- a/assets/js/sections/common.js
+++ b/assets/js/sections/common.js
@@ -339,6 +339,86 @@ function qso_edit(id) {
                             });
                         }
                     });
+
+                    // Populate satellite names datalist for edit dialog
+                    $.getJSON(base_url+"assets/json/satellite_data.json", function( data ) {
+                        var items = [];
+                        $.each( data, function( key, val ) {
+                            items.push('<option value="' + key + '">' + key + '</option>');
+                        });
+                        $('.satellite_names_list_edit').append(items.join( "" ));
+                    });
+
+                    // Handle satellite name change in edit dialog
+                    var selected_sat_edit;
+                    $('#sat_name_edit').on('input', function(){
+                        var optionslist = $('.satellite_names_list_edit')[0].options;
+                        var value = $(this).val();
+                        for (var x=0; x<optionslist.length; x++){
+                            if (optionslist[x].value === value) {
+                                $("#sat_mode_edit").val("");
+                                $('.satellite_modes_list_edit').find('option').remove().end();
+                                selected_sat_edit = value;
+                                
+                                // Get satellite modes from JSON
+                                $.getJSON( base_url+"assets/json/satellite_data.json", function( data ) {
+                                    var sat_modes = [];
+                                    $.each( data, function( key, val ) {
+                                        if (key == value) {
+                                            $.each( val.Modes, function( key1, val2 ) {
+                                                sat_modes.push('<option value="' + key1 + '">' + key1 + '</option>');
+                                            });
+                                        }
+                                    });
+                                    $('.satellite_modes_list_edit').append(sat_modes.join( "" ));
+                                });
+                                break;
+                            }
+                        }
+                    });
+
+                    // Handle satellite mode change in edit dialog to update frequencies and modes
+                    $('#sat_mode_edit').on('input', function(){
+                        var optionslist = $('.satellite_modes_list_edit')[0].options;
+                        var value = $(this).val();
+                        for (var x=0; x<optionslist.length; x++){
+                            if (optionslist[x].value === value) {
+                                var selected_sat_mode_edit = value;
+                                
+                                // Get satellite data from JSON
+                                $.getJSON( base_url+"assets/json/satellite_data.json", function( data ) {
+                                    $.each( data, function( key, val ) {
+                                        if (key == selected_sat_edit) {
+                                            $.each( val.Modes, function( key1, val2 ) {
+                                                if(key1 == selected_sat_mode_edit) {
+                                                    // Update mode - handle inverting transponders
+                                                    if ( (val2[0].Downlink_Mode == "LSB" && val2[0].Uplink_Mode == "USB") || 
+                                                         (val2[0].Downlink_Mode == "USB" && val2[0].Uplink_Mode == "LSB") ) {
+                                                        $("#mode").val("SSB");
+                                                    } else {
+                                                        $("#mode").val(val2[0].Uplink_Mode);
+                                                    }
+                                                    
+                                                    // Update bands based on frequencies
+                                                    $("#band").val(frequencyToBand(val2[0].Uplink_Freq));
+                                                    $("#band_rx").val(frequencyToBand(val2[0].Downlink_Freq));
+                                                    
+                                                    // Update frequencies
+                                                    $("#freq").val(val2[0].Uplink_Freq);
+                                                    $("#freqrx").val(val2[0].Downlink_Freq);
+                                                    
+                                                    // Update propagation mode to SAT
+                                                    $("#prop_mode").val('SAT');
+                                                }
+                                            });
+                                        }
+                                    });
+                                });
+                                break;
+                            }
+                        }
+                    });
+
                     // [eQSL default msg] change value (for qso edit page) //
                     $('.modal-content #stationProfile').change(function() {
                         qso_set_eqsl_qslmsg($('.modal-content #stationProfile').val(),false,'.modal-content');