I started using Dave Brown RCFS version 4.0 about 10 years ago. I borrowed an adapter from a friend to be able to control it with my Futaba Conquest 4NBF. I liked to brush up on maneuvers before going to the field. One several occasions I had to cut my flying short because the transmitter batteries were marginal. I returned the adapter and constructed my own controller from an old Conquest buddy box and some potentiometers. I much prefer the controller to the adapter.