Fact: Weber Music Hall has a MIDI pedalboard. If memory serves it might be the Roland PK-6. Or maybe not.
Fact: It’s awesome.
Fact: I want one.
Fact: I don’t have the many many hundreds of dollars it would cost to spend on things like MIDI pedalboards. However, I do have several junked organs’ worth of components and a seeming excess of free time.
Therefore: A midi pedalboard! Building it was surprisingly simple and straightforward (that is, after a two hour diversion of several circuit rebuilds necessitated by the assumption that the circuit was not being built around a faulty shift register. Spoiler alert: it was!).