I've finally designed and built a couple of modules for my synthesizer using the front panels and strip boards that I custom ordered a few months ago. Aaaaand they sound....absolutely horrifying! Better than I had hoped! Here's a video of me attacking my laptop's microphone with my 40-year-old synthesizer with the new modules:
I suggest hiding your laptop in a family member's room with this video playing on repeat.
Eventually I'll get around to posting the schematics and firmware on github so that other weirdos can build this stuff if they like. Currently I've built a dual voltage controlled low frequency oscillator (VCLFO) and a dual envelope generator.