The important thing to remember is that the radio's are compatible. They must be the same manufacturer and of the same type for the radio's to work identically. For instance, I have an Airtronics RD6000 which is a six channel radio. I MUST use another RD6000 as a buddy box for all functions to work. If I use a different Airtronics buddy box, only the basic four channel operations work, trim comes from each radio (for instance, the main box is trimmed for straight level flight then once the flight is turned over to the buddy box (the button is pressed and held) the buddy box must also trim up for it's control. The four channels on the buddy box work as normal but you also have to insure that the reverse controls are set up correctly .. do all this on the ground to avoid that ground-aircraft interface we all fear!!!

With identical computer radio's, though, all functions of the main box will be available to the buddy box... again.. RD-6000 and RD-6000 linked together (for instance). I'm sure it is the same for the other three, Futaba, JR, and HiTec.

Good luck with your training.

DS