I had spare PCBs left over from an earlier project. I got the Signature Plastics DSS Honeywell keycaps on sale from a vendor who was closing down. I made the plate design using online tools, then cut it and the bottom plate on my home laser. I designed the 3D-printed case to look like the original terminal keyboards that inspired the keycaps. I used black switches because a heavy linear feels right for something like this. Firmware is QMK/VIAL. More info here. There's much that could be better, but I'm pleased with how it came out.