Build a Pedalboard-Sized Volume Pedal for less than $10

I call it Vmini. At 6" by 3", it fits nicely on a pedalboard. Or you can use it like I do... sitting on the floor next to my keyboard rig. More than 90% of the unit is 3D printed (get the STL files here: https://www.thingiverse.com/thing:692... ) or go to Thingiverse and search Vmini. Even if you price in the cost of the 3D printer filament, you should get away at around $8.00 US. And no special skills are needed.