Hello there. Here is what I did to make a RK2 work with MODEP Basically is a layer that grabs the output of the rk2 and converts it into MIDI msgs. I don’t know if it works for RK3, maybe it’s worth a try, with a little adjustment to the code to make it work with 8 footswitches.
Check it out: Hacking a RigKontrol 2 as a MODEP controller
Feel free to ask questions.