Hi,
in our crossover-world, VBar Control is always the Teacher, not the Student.
The radio together with the VBar NEO comprises the system, the third party receiver is an addendum.
You could program a VBar NEO VBasic in a way so it outputs e.g. Futaba SBus, but I doubt that a Futaba Receiver will accept a secondary Futaba Receiver as an input, in a way so you (the teacher) can just switch between the two. Then, they would be forward-thinking
You could also program a VBar NEO VBasic in a way so it outputs PPM signal, like old school wired buddy boxing.
Then you'd need a buddy wire between a powered up and bound VBar NEO VBasic, and the buddy connector on the Futaba (or other) radio.
Problem is, Futaba went their own way, not the simple audio jack way, so you might even need an adapter for the adapter, or MacGyver your own.
Question would also be, how would VBar NEO VBasic as a full blown 2.4 GHz transceiver affect the Futaba radio, depending on how close it was in relation to the actual aircraft radio (stick to radio, or let dangle at it's wire, or use a longer buddy wire and set it aside somewhat).
I'd probably grab the cheapest buddy-capable Futaba radio, and if it was a used one, just for that purpose.
Kind regards
Eddi
Born to fly ...
forced to work.