That's the way it usually works.. the master is the 'better' TX and the slave is the lesser model or the buddy box. And, yeah, the Futabas do have a round and a square connector. We have both in our club so we're good. Thanks for posting that information from Futaba. That will be useful. There is also a round to square adapter for the Futabas.

Usually, when working with plain jane buddy boxes, any computer setup on the master will not work when in the buddy box mode. It will usually work if BOTH transmitters are the same, ie. both computer radios AND both set up exactly the same.

The delay is each time you press the button. That one second should not be a factor in determining if to use one.... just make sure the student is at least "3 mistakes high" in altitude, meaning plenty high up there.. and that the plane is in trim and the student is ready to accept control. Say to him or her.. 'YOU HAVE THE AIRPLANE' before pushing the button.

CGr.