We're getting close now. The final PCB revision is in my hands, and beyond the fact that I somehow managed to mess up the export so part footprints weren't included in the back solder mask, I'm very happy with them. I've also got a proper programmer, and the firmware is close to being done.

In short, things are looking very good. The trick now is to figure out how to produce another ~28 of these things in the next two weeks at a quality level I'm happy with. This will involve creating some custom tooling and jigs, which I'll be posting about shortly.