Remapping of channels in PASSTHROUGH mode?

Apologies if I have missed something like this somewhere… but I have found I need to ‘waste’ channels due to an apparent limitation of the APM code. This happens when a channel is used by the auto pilot, for e.g. if RC5 is set to function FLAPERON2, then the input channel 5 (from the rx) cannot be used as a PASSTHROUGH.

Two easy ways this could work:

  1. New function codes 102, 103 etc for 1(PASSTHROUGH) and 02(SOURCE CHANNEL 2)
  2. Add a parameter for each channel eg RC5_PASSTHROUGH_SOURCE