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
EXP-1 Expression Pedal | Parts
Fender Mustang/Rumble1-BtnFootswitch – Thomann United States
Fender Mustang Floor pedal, Mustang MS-4 footswitch, EXP-1 pedal Motu Z Box and - Capitol Guitars