@ Chris
yes, you are right with the wiring of the MD-BT01.
Unfortunately, I have no solution for the question of the footswitch.
Regards
Matthias, as I suspected MIDI Designer supports external midi controllers and foot controllers as in this video.
https://www.youtube.com/watch?time_continue=33&v=QTPwArwcHMoIs there any way you can share your MIDI Desinger file?
Thanks,
Chris