It's a work in progress. The Fender expression pedal and multi-effect switcher control my Fender Mustang GTX-100 amp—I use the reverb and modulation effects in the amp. Feedback welcome! : r/guitarpedals
MGT-4 Footswitch | Parts
MUSTANG (V.2) BY FENDER®
Fender Mustang II Footswitch Programming - YouTube