Corsair recently shut down Drop, their Keyboard/Audio/EDC brand that used to be Massdrop. In the fire sale, you could get a solid aluminum TKL (the "CTRL") case for ten bucks. I have done quite a few handwired keyboards in the past few years, usually custom layouts (or else why bother?), but this seemed like an interesting challenge. The integrated switchplate was not milled to very tight tolerances, so I had to find the manufacturing files for an open source aftermarket PCB and turn one of them into a DXF file for my laser, so I could use it as a dummy PCB to hold the switches still. I also had to 3D print a spacer to go between the case's two halves, because the spacer/LED diffuser that originally went with that board was a separate part and I didn't realize I'd need one until the site was shut down. I used an open source tool to generate a build of the open source "ZMK" firmware, and after some tedious troubleshooting and some structural hot-glue, everything works and from the outside it looks pretty normal. Caps are MOA profile from Amazon resale, and switches are generic reds (light linear), lubed and spring swapped so they're heavy linears.
