This is interesting and could come in handy due to its simplicity.
Not really related to Behringer XTouch itself, but may I also suggest my tutorial on how to use any secondary PC keyboard as a MIDI input to control MSFS.
This has the benefits of:
a) the only hardware requirement is a standard keyboard,
b) the keyboard will be independent of any Windows input, so typing on it will not have any side effects to any app or MSFS itself (unless we’ve explicitily mapped it to do something in MSFS)
c) using it with an app such as spad.next it can be mapped to send direct Simconnect events or data changes, LVARs, HVARs etc, rather than keyboard strokes (ie. SIMCONNECT:GEAR_TOGGLE rather than just “G”, which would then need to be mapped in MSFS)
Using the above, I’ve set up a lowly wireless Rii mini keyboard to act as the MCDU input in my WT CJ4 which works perfectly fine. Combined with a couple of Behringers it helps immensely in mouse-less control of the aircraft.