Recently i found Barefoot Buttons, a guitar pedal footswitch cover enabling you to be a dirty hippie and engage pedals while being (ob)noxiously barefoot. Even better, if you are a synthesist (especially of a modular synth variety), or a Merzbow clone, you would use pedals on a desktop, using hands to engage them, which can, depending on the type of the footswitch and tenderness of your precious palms be stressful. Thus, open source variation on the theme of the barefoot button cover :)

This is version 0.3, footswitch insert is modeled on Strymon pedal (yes, i am fancy) footswitches, meaning the hole diameter is 11mm, but a simple dremel therapy will make it snug for bigger diameter switches.

Made with Tinkercad. Edit it online https://www.tinkercad.com/things/bSYRpcwXfXf