As the title states, I am trying to do the same as here:
http://ardupilot.org/copter/docs/heliquads.html
I loaded the param file, went through the configs, everything is fine, I can enable/disable the motor, control the servos, the gyros seem and compensating fine but the 4th servo (POT 4) is reacting like a rudder from a 120 degree CPPM heli when it should be working collectively with the other 3 servos to lift and fly. What did I do wrong? I laid out the servos exactly as in the link, the connections are the same, using FS0i10 single wire conector, radio is fine, reacts normally on screen but the physical servo only responds to rudder (yaw) inputs when it should be working with the other 3 and raising lowering collective pitch for lift/decent and roll. Frame class and type are set correctly (same WLToys drone). I also setup the motor interlock on channel 8. The link says to use traditional helicopter firmware, which I did. I am also using NUTX but it doesnt make a difference what OS I use, same output so I am assuming I missed a step. Any help would be GREATLY appreciated!