Managed to work out alternative jumper positions allowing for basic functionality. Here's a clip of the module I designed turning LFOs from a Just Friends into a sequence of gates and sending them out to another Just Friends, a BitBox, an nRings, and a Manis Iteritas Alia, with a little extra modulation on the nRings from an ochd.

Recorded on my phone with a cheap USB-C microphone adapter and heavily compressed to save space on the server, so apologies for the quality! 7.65MB, 45 seconds, 480p.

Latest print has a reliable sleeve switch but the tip switch doesn't work. Also very fiddly and annoying to get the copper routed. Printing a version which will hopefully alleviate these issues a bit.

Unsure whether to continue this development or just buy my jacks like a normal person. I've dropped my need for transparent plastic and have found an alternative that meets my size requirements, so what am I even doing this for now?

This design will require bigger through-holes than I'd wanted. Little room for bosses here. But the tip insertion sensing is working reliably so far, at least with this one prototype. The sleeve insertion sensing pin seems to be getting pushed too far up to return to the right position, so I'll have to try adjusting that.

Uses two paperclips per jack.

Looks like y'all are somewhat interested in what I'm doing here, so here's a photo of some of my attempts.

The two big rows in front were my first, as I plan on making this an LED and jack assembly and foolishly though this would be simple. The one on the perfboard had severe pin mobility problems and was not very forgiving of imprecise wire work. It did at least allow me to confirm my ability to solder a pin connected to PLA without melting it, though.

More details in the alt text.

No epoxy yet because I don't have proper PPE for that shit at the moment, and won't until December 3rd at the earliest. Still gonna wire it all up and test it out a bit. Here's a progress photo.

Hope I don't fry anything!