@tim:
You should be able to use the PITCHBEND & MODWHEEL pots exactly as wired. PITCHBEND usually has some mechanical mechanism to return it to center when not activated, so I'll assume that this is the case in my functional description below...
The bill of materials and build guide is online if you want to source yourself
https://ornament-and-cri.me/build-it/
You could also try a kit, with all smd soldered already
https://www.thonk.co.uk/shop/plum-audio-ocp/
If you plan on using...
Looks good.
No matter which kind of cable or PCB is used, be careful about the total power supply capacitance if it will ever be hot plugged. The Teensy 4.1 design assumes a SD card with very little capacitance. If you have several uF power...