RE: Plan to upgrade to a 9C
The differences that I know between the 9C Airplane and Heli versions is this.
1) Switches are on opposite sides of the TX (ie Trainer on Air left or Heli right)
2) Default programing is for Aircraft or Heli respectively.
3) Ratchet and non-ratchet throttle (flip the ratchet arm over on the airplane and it is smooth)