diff --git a/libraries/RC_Channel/RC_Channel.cpp b/libraries/RC_Channel/RC_Channel.cpp
index 3d8aa7d1d3..dc9546ca41 100644
--- a/libraries/RC_Channel/RC_Channel.cpp
+++ b/libraries/RC_Channel/RC_Channel.cpp
@@ -98,9 +98,9 @@ const AP_Param::GroupInfo RC_Channel::var_info[] = {
     // @Param: OPTION
     // @DisplayName: RC input option
     // @Description: Function assigned to this RC channel
-    // @Values{Copter}: 0:Do Nothing, 2:Flip, 3:Simple Mode, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 10:RangeFinder, 11:Fence, 13:Super Simple Mode, 14:Acro Trainer, 15:Sprayer, 16:Auto, 17:AutoTune, 18:Land, 19:Gripper, 21:Parachute Enable, 22:Parachute Release, 23:Parachute 3pos, 24:Auto Mission Reset, 25:AttCon Feed Forward, 26:AttCon Accel Limits, 27:Retract Mount, 28:Relay On/Off, 29:Landing Gear, 30:Lost Copter Sound, 31:Motor Emergency Stop, 32:Motor Interlock, 33:Brake, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 37:Throw, 38:ADSB Avoidance En, 39:PrecLoiter, 40:Proximity Avoidance, 41:ArmDisarm (4.1 and lower), 42:SmartRTL, 43:InvertedFlight, 46:RC Override Enable, 47:User Function 1, 48:User Function 2, 49:User Function 3, 52:Acro, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 60:ZigZag, 61:ZigZag SaveWP, 62:Compass Learn, 65:GPS Disable, 66:Relay5 On/Off, 67:Relay6 On/Off, 68:Stabilize, 69:PosHold, 70:AltHold, 71:FlowHold, 72:Circle, 73:Drift, 75:SurfaceTrackingUpDown, 76:Standby Mode, 78:RunCam Control, 79:RunCam OSD Control, 80:VisOdom Align, 81:Disarm, 83:ZigZag Auto, 84:Air Mode, 85:Generator, 90:EKF Pos Source, 94:VTX Power, 99:AUTO RTL, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw, 151:Turtle, 152:simple heading reset, 153:ArmDisarm (4.2 and higher), 154:ArmDisarm with AirMode  (4.2 and higher), 158:Optflow Calibration, 159:Force Flying, 161:Turbine Start(heli), 162:FFT Tune, 163:Mount Lock, 164:Pause Stream Logging, 165:Arm/Emergency Motor Stop, 212:Mount Roll, 213:Mount Pitch, 214:Mount Yaw, 215:Mount2 Roll, 216:Mount2 Pitch, 217:Mount2 Yaw, 300:Scripting1, 301:Scripting2, 302:Scripting3, 303:Scripting4, 304:Scripting5, 305:Scripting6, 306:Scripting7, 307:Scripting8
-    // @Values{Rover}: 0:Do Nothing, 4:RTL, 5:Save Trim (4.1 and lower), 7:Save WP, 9:Camera Trigger, 11:Fence, 16:Auto, 19:Gripper, 24:Auto Mission Reset, 27:Retract Mount, 28:Relay On/Off, 30:Lost Rover Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 40:Proximity Avoidance, 41:ArmDisarm (4.1 and lower), 42:SmartRTL, 46:RC Override Enable, 50:LearnCruise, 51:Manual, 52:Acro, 53:Steering, 54:Hold, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 59:Simple Mode, 62:Compass Learn, 63:Sailboat Tack, 65:GPS Disable, 66:Relay5 On/Off, 67:Relay6 On/Off, 74:Sailboat motoring 3pos, 78:RunCam Control, 79:RunCam OSD Control, 80:Viso Align, 81:Disarm, 90:EKF Pos Source, 94:VTX Power, 97:Windvane home heading direction offset, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw, 106:Disable Airspeed Use, 153:ArmDisarm (4.2 and higher), 155: set steering trim to current servo and RC, 156:Torqeedo Clear Err, 162:FFT Tune, 163:Mount Lock, 164:Pause Stream Logging, 165:Arm/Emergency Motor Stop, 201:Roll, 202:Pitch, 207:MainSail, 208:Flap, 211:Walking Height, 212:Mount Roll, 213:Mount Pitch, 214:Mount Yaw, 215:Mount2 Roll, 216:Mount2 Pitch, 217:Mount2 Yaw, 300:Scripting1, 301:Scripting2, 302:Scripting3, 303:Scripting4, 304:Scripting5, 305:Scripting6, 306:Scripting7, 307:Scripting8
-    // @Values{Plane}: 0:Do Nothing, 4:ModeRTL, 9:Camera Trigger, 11:Fence, 16:ModeAuto, 22:Parachute Release, 24:Auto Mission Reset, 27:Retract Mount, 28:Relay On/Off, 29:Landing Gear, 30:Lost Plane Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 38:ADSB Avoidance En, 41:ArmDisarm (4.1 and lower), 43:InvertedFlight, 46:RC Override Enable, 51:ModeManual, 52: ModeACRO, 55:ModeGuided, 56:ModeLoiter, 58:Clear Waypoints, 62:Compass Learn, 64:Reverse Throttle, 65:GPS Disable, 66:Relay5 On/Off, 67:Relay6 On/Off, 72:ModeCircle, 77:ModeTakeoff, 78:RunCam Control, 79:RunCam OSD Control, 81:Disarm, 82:QAssist 3pos, 84:Air Mode, 85:Generator, 86: Non Auto Terrain Follow Disable, 87:Crow Select, 88:Soaring Enable, 89:Landing Flare, 90:EKF Pos Source, 91:Airspeed Ratio Calibration, 92:FBWA, 94:VTX Power, 95:FBWA taildragger takeoff mode, 96:trigger re-reading of mode switch, 98: ModeTraining, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw, 106:Disable Airspeed Use, 107: EnableFixedWingAutotune, 108: ModeQRTL, 150: CRUISE, 153:ArmDisarm (4.2 and higher), 154:ArmDisarm with Quadplane AirMode (4.2 and higher), 155: set roll pitch and yaw trim to current servo and RC, 157: Force FS Action to FBWA, 158:Optflow Calibration, 160:Weathervane Enable, 162:FFT Tune, 163:Mount Lock, 164:Pause Stream Logging, 165:Arm/Emergency Motor Stop, 208:Flap, 209: Forward Throttle, 210: Airbrakes, 212:Mount Roll, 213:Mount Pitch, 214:Mount Yaw, 215:Mount2 Roll, 216:Mount2 Pitch, 217:Mount2 Yaw, 300:Scripting1, 301:Scripting2, 302:Scripting3, 303:Scripting4, 304:Scripting5, 305:Scripting6, 306:Scripting7, 307:Scripting8
+    // @Values{Copter}: 0:Do Nothing, 2:Flip, 3:Simple Mode, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 10:RangeFinder, 11:Fence, 13:Super Simple Mode, 14:Acro Trainer, 15:Sprayer, 16:Auto, 17:AutoTune, 18:Land, 19:Gripper, 21:Parachute Enable, 22:Parachute Release, 23:Parachute 3pos, 24:Auto Mission Reset, 25:AttCon Feed Forward, 26:AttCon Accel Limits, 27:Retract Mount1, 28:Relay On/Off, 29:Landing Gear, 30:Lost Copter Sound, 31:Motor Emergency Stop, 32:Motor Interlock, 33:Brake, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 37:Throw, 38:ADSB Avoidance En, 39:PrecLoiter, 40:Proximity Avoidance, 41:ArmDisarm (4.1 and lower), 42:SmartRTL, 43:InvertedFlight, 46:RC Override Enable, 47:User Function 1, 48:User Function 2, 49:User Function 3, 52:Acro, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 60:ZigZag, 61:ZigZag SaveWP, 62:Compass Learn, 65:GPS Disable, 66:Relay5 On/Off, 67:Relay6 On/Off, 68:Stabilize, 69:PosHold, 70:AltHold, 71:FlowHold, 72:Circle, 73:Drift, 75:SurfaceTrackingUpDown, 76:Standby Mode, 78:RunCam Control, 79:RunCam OSD Control, 80:VisOdom Align, 81:Disarm, 83:ZigZag Auto, 84:Air Mode, 85:Generator, 90:EKF Pos Source, 94:VTX Power, 99:AUTO RTL, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw, 151:Turtle, 152:simple heading reset, 153:ArmDisarm (4.2 and higher), 154:ArmDisarm with AirMode  (4.2 and higher), 158:Optflow Calibration, 159:Force Flying, 161:Turbine Start(heli), 162:FFT Tune, 163:Mount Lock, 164:Pause Stream Logging, 165:Arm/Emergency Motor Stop, 212:Mount1 Roll, 213:Mount1 Pitch, 214:Mount1 Yaw, 215:Mount2 Roll, 216:Mount2 Pitch, 217:Mount2 Yaw, 300:Scripting1, 301:Scripting2, 302:Scripting3, 303:Scripting4, 304:Scripting5, 305:Scripting6, 306:Scripting7, 307:Scripting8
+    // @Values{Rover}: 0:Do Nothing, 4:RTL, 5:Save Trim (4.1 and lower), 7:Save WP, 9:Camera Trigger, 11:Fence, 16:Auto, 19:Gripper, 24:Auto Mission Reset, 27:Retract Mount1, 28:Relay On/Off, 30:Lost Rover Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 40:Proximity Avoidance, 41:ArmDisarm (4.1 and lower), 42:SmartRTL, 46:RC Override Enable, 50:LearnCruise, 51:Manual, 52:Acro, 53:Steering, 54:Hold, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 59:Simple Mode, 62:Compass Learn, 63:Sailboat Tack, 65:GPS Disable, 66:Relay5 On/Off, 67:Relay6 On/Off, 74:Sailboat motoring 3pos, 78:RunCam Control, 79:RunCam OSD Control, 80:Viso Align, 81:Disarm, 90:EKF Pos Source, 94:VTX Power, 97:Windvane home heading direction offset, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw, 106:Disable Airspeed Use, 153:ArmDisarm (4.2 and higher), 155: set steering trim to current servo and RC, 156:Torqeedo Clear Err, 162:FFT Tune, 163:Mount Lock, 164:Pause Stream Logging, 165:Arm/Emergency Motor Stop, 201:Roll, 202:Pitch, 207:MainSail, 208:Flap, 211:Walking Height, 212:Mount1 Roll, 213:Mount1 Pitch, 214:Mount1 Yaw, 215:Mount2 Roll, 216:Mount2 Pitch, 217:Mount2 Yaw, 300:Scripting1, 301:Scripting2, 302:Scripting3, 303:Scripting4, 304:Scripting5, 305:Scripting6, 306:Scripting7, 307:Scripting8
+    // @Values{Plane}: 0:Do Nothing, 4:ModeRTL, 9:Camera Trigger, 11:Fence, 16:ModeAuto, 22:Parachute Release, 24:Auto Mission Reset, 27:Retract Mount1, 28:Relay On/Off, 29:Landing Gear, 30:Lost Plane Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 38:ADSB Avoidance En, 41:ArmDisarm (4.1 and lower), 43:InvertedFlight, 46:RC Override Enable, 51:ModeManual, 52: ModeACRO, 55:ModeGuided, 56:ModeLoiter, 58:Clear Waypoints, 62:Compass Learn, 64:Reverse Throttle, 65:GPS Disable, 66:Relay5 On/Off, 67:Relay6 On/Off, 72:ModeCircle, 77:ModeTakeoff, 78:RunCam Control, 79:RunCam OSD Control, 81:Disarm, 82:QAssist 3pos, 84:Air Mode, 85:Generator, 86: Non Auto Terrain Follow Disable, 87:Crow Select, 88:Soaring Enable, 89:Landing Flare, 90:EKF Pos Source, 91:Airspeed Ratio Calibration, 92:FBWA, 94:VTX Power, 95:FBWA taildragger takeoff mode, 96:trigger re-reading of mode switch, 98: ModeTraining, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw, 106:Disable Airspeed Use, 107: EnableFixedWingAutotune, 108: ModeQRTL, 150: CRUISE, 153:ArmDisarm (4.2 and higher), 154:ArmDisarm with Quadplane AirMode (4.2 and higher), 155: set roll pitch and yaw trim to current servo and RC, 157: Force FS Action to FBWA, 158:Optflow Calibration, 160:Weathervane Enable, 162:FFT Tune, 163:Mount Lock, 164:Pause Stream Logging, 165:Arm/Emergency Motor Stop, 208:Flap, 209: Forward Throttle, 210: Airbrakes, 212:Mount1 Roll, 213:Mount1 Pitch, 214:Mount1 Yaw, 215:Mount2 Roll, 216:Mount2 Pitch, 217:Mount2 Yaw, 300:Scripting1, 301:Scripting2, 302:Scripting3, 303:Scripting4, 304:Scripting5, 305:Scripting6, 306:Scripting7, 307:Scripting8
     // @Values{Blimp}: 0:Do Nothing, 18:Land, 46:RC Override Enable, 65:GPS Disable, 81:Disarm, 90:EKF Pos Source, 100:KillIMU1, 101:KillIMU2, 153:ArmDisarm, 164:Pause Stream Logging
     // @User: Standard
     AP_GROUPINFO_FRAME("OPTION",  6, RC_Channel, option, 0, AP_PARAM_FRAME_COPTER|AP_PARAM_FRAME_ROVER|AP_PARAM_FRAME_PLANE|AP_PARAM_FRAME_BLIMP),
@@ -527,7 +527,7 @@ void RC_Channel::init_aux_function(const aux_func_t ch_option, const AuxSwitchPo
     case AUX_FUNC::DISABLE_AIRSPEED_USE:
     case AUX_FUNC::FFT_NOTCH_TUNE:
 #if HAL_MOUNT_ENABLED
-    case AUX_FUNC::RETRACT_MOUNT:
+    case AUX_FUNC::RETRACT_MOUNT1:
     case AUX_FUNC::MOUNT_LOCK:
 #endif
     case AUX_FUNC::LOG_PAUSE:
@@ -558,7 +558,7 @@ const RC_Channel::LookupTable RC_Channel::lookuptable[] = {
     { AUX_FUNC::PARACHUTE_RELEASE,"ParachuteRelease"},
     { AUX_FUNC::PARACHUTE_3POS,"Parachute3Position"},
     { AUX_FUNC::MISSION_RESET,"MissionReset"},
-    { AUX_FUNC::RETRACT_MOUNT,"RetractMount"},
+    { AUX_FUNC::RETRACT_MOUNT1,"RetractMount1"},
     { AUX_FUNC::RELAY,"Relay1"},
     { AUX_FUNC::MOTOR_ESTOP,"MotorEStop"},
     { AUX_FUNC::MOTOR_INTERLOCK,"MotorInterlock"},
@@ -1197,7 +1197,7 @@ bool RC_Channel::do_aux_function(const aux_func_t ch_option, const AuxSwitchPos
         break;
     }
 
-    case AUX_FUNC::RETRACT_MOUNT: {
+    case AUX_FUNC::RETRACT_MOUNT1: {
 #if HAL_MOUNT_ENABLED
         AP_Mount *mount = AP::mount();
         if (mount == nullptr) {
@@ -1205,13 +1205,13 @@ bool RC_Channel::do_aux_function(const aux_func_t ch_option, const AuxSwitchPos
         }
         switch (ch_flag) {
             case AuxSwitchPos::HIGH:
-                mount->set_mode(MAV_MOUNT_MODE_RETRACT);
+                mount->set_mode(0,MAV_MOUNT_MODE_RETRACT);
                 break;
             case AuxSwitchPos::MIDDLE:
                 // nothing
                 break;
             case AuxSwitchPos::LOW:
-                mount->set_mode_to_default();
+                mount->set_mode_to_default(0);
                 break;
         }
 #endif
diff --git a/libraries/RC_Channel/RC_Channel.h b/libraries/RC_Channel/RC_Channel.h
index ef22aad1e5..36c4df07e9 100644
--- a/libraries/RC_Channel/RC_Channel.h
+++ b/libraries/RC_Channel/RC_Channel.h
@@ -124,7 +124,7 @@ public:
         MISSION_RESET =       24, // Reset auto mission to start from first command
         ATTCON_FEEDFWD =      25, // enable/disable the roll and pitch rate feed forward
         ATTCON_ACCEL_LIM =    26, // enable/disable the roll, pitch and yaw accel limiting
-        RETRACT_MOUNT =       27, // Retract Mount
+        RETRACT_MOUNT1 =      27, // Retract Mount1
         RELAY =               28, // Relay pin on/off (only supports first relay)
         LANDING_GEAR =        29, // Landing gear controller
         LOST_VEHICLE_SOUND =  30, // Play lost vehicle sound