Doesn't need the SDK, Its only 2 existing parameters in PX4 but Yuneec don't give write access to them and can't be bothered to change them and issue a mode version
RC_MAP_THROTTLE (1=mode 2 & 3 = mode 1) RC_MAP_PITCH (3=mode 2 & 1 = mode 1)
RC_MAP_THROTTLE (1=mode 2 & 3 = mode 1) RC_MAP_PITCH (3=mode 2 & 1 = mode 1)