I'm no expert at this but... The instructors box is the master and the one
thats powered up and the ant. is also up, The slave or trainees radio is I
think, off (I could be wrong) with the ant. down.. The slave gets everything
from the master radio once the instructor activates the trainer function..
Now both radios should match the trim set-up and any servo reversing as
need be.. I'm not sure if Hitec and Futaba will work together... I thought
both radios had to be of the same make...