AGO Pedalboard
Foot Controls Interface
midiboutique.com midiboutique
midiboutique.com midiboutique hwce2x
midi-hardware.com Roman Sowa MIDI Hardware
mrg3 MRG3
midi-hardware.com Midi-Hardware Tutorial
See last section - keyboards, stops, pedals, pistons and swell shoes
midicpu.com Highly Liquid Instant DIY MIDI Controller
NickNelson
NickNelson
NickNelson - DIY Pedal/manual encoder