MODEP and custom MIDI pedalboard


Hi everyone!
I’m very new to forum after only discovering thePisound and MODEP image very recently - what a great bit of software!
What I am now aiming to do is build my own all-in-one pedal with plenty of features to keep me going; buttons to control effect on/off values, two potentiometers (to be used as expression pedal inputs), some encoders for menus rtf.
I have the MODEP image all loaded on my Pi (with up settings updated to my Alesis io2 interface, and it seems to be loading perfectly well, which is a result!
Now just need to build the interface for this board, complete with its buttons.
Has anyone else attempted to create their own footswitch for this great bit of kit?
If so any advice or pictures would be a great help.