diff --git a/examples/openarms_web_interface/App.jsx b/examples/openarms_web_interface/App.jsx
index 662eb57e3..ec613bc55 100644
--- a/examples/openarms_web_interface/App.jsx
+++ b/examples/openarms_web_interface/App.jsx
@@ -46,7 +46,13 @@ function App() {
     try {
       const saved = localStorage.getItem('openarms_config');
       if (saved) {
-        setConfig(prev => ({ ...prev, ...JSON.parse(saved) }));
+        const loadedConfig = JSON.parse(saved);
+        // If OpenArms Mini is selected, ensure followers are set to can0/can1
+        if (loadedConfig.leader_type === 'openarms_mini') {
+          loadedConfig.follower_left = 'can0';
+          loadedConfig.follower_right = 'can1';
+        }
+        setConfig(prev => ({ ...prev, ...loadedConfig }));
       }
     } catch (e) {
       console.error('Load config error:', e);
@@ -87,6 +93,11 @@ function App() {
         if (!localStorage.getItem('openarms_config')) {
           setConfig(prev => {
             const merged = { ...data.config, ...prev };
+            // If OpenArms Mini is selected, ensure followers are set to can0/can1
+            if (merged.leader_type === 'openarms_mini') {
+              merged.follower_left = 'can0';
+              merged.follower_right = 'can1';
+            }
             localStorage.setItem('openarms_config', JSON.stringify(merged));
             return merged;
           });
@@ -379,6 +390,27 @@ function App() {
   useEffect(() => {
     if (config.leader_type === 'openarms_mini') {
       discoverUsbPorts();
+      // Explicitly set follower CAN interfaces when using OpenArms Mini
+      // Followers MUST use can0 = left arm, can1 = right arm
+      // Force these values even if they were previously different
+      const updated = { 
+        ...config, 
+        follower_left: 'can0',   // Explicitly set left follower to can0
+        follower_right: 'can1'   // Explicitly set right follower to can1
+      };
+      setConfig(updated);
+      saveConfig(updated);
+    } else {
+      // When switching back to OpenArms, restore CAN interface defaults
+      const updated = { 
+        ...config, 
+        leader_left: canInterfaces.includes(config.leader_left) ? config.leader_left : 'can0',
+        leader_right: canInterfaces.includes(config.leader_right) ? config.leader_right : 'can1',
+        follower_left: 'can2',   // OpenArms standard: followers on can2/can3
+        follower_right: 'can3'
+      };
+      setConfig(updated);
+      saveConfig(updated);
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [config.leader_type]);
@@ -456,7 +488,7 @@ function App() {
                 <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: '0.5rem' }}>
                   <h3>
                     {config.leader_type === 'openarms_mini' 
-                      ? `Leader Ports (USB) ${availableUsbPorts.length > 0 ? `(${availableUsbPorts.length} detected)` : ''}` 
+                      ? `Leader Ports (USB/Serial) ${availableUsbPorts.length > 0 ? `(${availableUsbPorts.length} detected)` : ''}` 
                       : 'Leader Interfaces (CAN)'}
                   </h3>
                   {config.leader_type === 'openarms_mini' && (
@@ -469,6 +501,7 @@ function App() {
                     </button>
                   )}
                 </div>
+                
                 <div className="config-grid">
                   <label>
                     Leader Left
@@ -521,30 +554,52 @@ function App() {
               {/* Follower CAN Interfaces */}
               <div className="config-section">
                 <h3>Follower Interfaces (CAN)</h3>
+                
+                {config.leader_type === 'openarms_mini' && (
+                  <div style={{ 
+                    backgroundColor: '#fff4e6', 
+                    padding: '0.75rem', 
+                    borderRadius: '4px', 
+                    marginBottom: '0.75rem',
+                    fontSize: '0.9rem',
+                    border: '1px solid #ffd699'
+                  }}>
+                    🔒 <strong>Auto-assigned:</strong> Follower ports are fixed as can0 (left) and can1 (right) when using OpenArms Mini
+                  </div>
+                )}
+                
                 <div className="config-grid">
                   <label>
                     Follower Left
                     <select
-                      value={config.follower_left}
+                      value={config.leader_type === 'openarms_mini' ? 'can0' : config.follower_left}
                       onChange={(e) => updateConfig('follower_left', e.target.value)}
-                      disabled={isRecording || robotsReady}
+                      disabled={isRecording || robotsReady || config.leader_type === 'openarms_mini'}
                     >
-                      {canInterfaces.map((iface) => (
-                        <option key={iface} value={iface}>{iface}</option>
-                      ))}
+                      {config.leader_type === 'openarms_mini' ? (
+                        <option value="can0">can0 (Auto-assigned)</option>
+                      ) : (
+                        canInterfaces.map((iface) => (
+                          <option key={iface} value={iface}>{iface}</option>
+                        ))
+                      )}
                     </select>
                   </label>
 
                   <label>
                     Follower Right
                     <select
-                      value={config.follower_right}
+                      value={config.leader_type === 'openarms_mini' ? 'can1' : config.follower_right}
                       onChange={(e) => updateConfig('follower_right', e.target.value)}
-                      disabled={isRecording || robotsReady}
+                      disabled={isRecording || robotsReady || config.leader_type === 'openarms_mini'}
                     >
-                      {canInterfaces.map((iface) => (
-                        <option key={iface} value={iface}>{iface}</option>
-                      ))}
+                      {config.leader_type === 'openarms_mini' ? (
+                        <option value="can1">can1 (Auto-assigned)</option>
+                      ) : (
+                        canInterfaces.map((iface) => (
+                          <option key={iface} value={iface}>{iface}</option>
+                        ))
+                      )}
                     </select>
                   </label>
                 </div>