Hello! I am trying to mount two gimbals on a single vehicle, i only need pitch axes. I am able to configure one of them as MNT1 but cant find the parameters for the other i.e MNT2. Servo Gimbal — Copter documentation Here it says up to two gimbals are supported.
Update to ArduCopter 4.3.5 or even better: 4.4.0-dev