The GPS and FPV on screen display module are installed now. Wiring the OSD was much less difficult then I first thought it might be. The compass IC on the GPS module had to have some solder joints fixed... I guess that's what you get when yo pay $50 for one. One of the pins was obviously not making good contact on visual inspection, and there was a solder splash grounding out another pin. I'll update with some more details of that later.
Here's some video from the weekend, two very accurate shots with an RPG-7: