Got the diodes today, and I managed to get it working. It was harder than it probably had to be, since I had to solder through-hole diodes without the luxury of, y'know, going through the hole, but I managed. Everything is working now.
The board is a joy to type in, as I had hoped. Using the TECK for the past 8 months has eliminated most of the adjustment phase most people go through (the grid layout, using only one thumb for space, etc.), but it's still going to take a lot of getting used to. Most notably:
1) It slides around. The split layout is genius, since you can set it wherever you want it limited only by the length of the cable (I may try to connect mine to the arms of a recliner so that I can work from the comfort of my imperial throne), but once you get it where you want it, it'd be nice to keep it there.
2) Vertical incline. I'd lay money this thing is supposed to be used slanted a little bit upward, and I don't know how to get it that way, assuming the reclining throne doesn't pan out. I've seen some models with fancy wooden wrist wrests, but I think those were custom-made or part of a limited run.
3) Wrist pain. This is probably just a matter of getting used to it, but my thumbs feel as if they're in very unnatural positions, having to stretch this far. Also, it's tricky reaching the modifier keys above the backspace, enter, space, and forward delete keys, and very difficult reaching the Home and Page Up keys. I have to move my entire hand to get to those ones.
4) Filthy rat-tails. Any chance of making this whole thing cordless?
Thanks again for all the help getting it working.