On the trainer menu, when in "stick" mode, have the option to select channel from 5 to 9.
Currently, one can only select the Rudder, Throttle, Aileron and Elevator.
This is useless for FPV head-tracking systems which use the AUX channels to move the Pan&Tilt servos. It is also useless when you want to have another person with the student TX just to control a bomb drop or something while you are flying the plane.
Also, the trainer menu should have an option to use a "dumb" slave TX with no mixes, or Dual Rates/Exponentials, etc.
The student TX would just send plain standard stick movement (1ms to 2 ms pulses) and the Aurora would apply all the necessary mixes, trims, D/R, Exp, EPA and even servo reversals.
I see no "open software architecture" on the trainer menu
Please consider this also.