I've installed the parts from post #9. For about $40 I'm happy with it, but it certainly should be easier.
I didn't make a video because: a) it was a pain in the butt, and I was too occupied with figuring out the problems, and b) it's all too tight to really film what's going on. Also, once you've seen how the adaptor assembles, the rest of the arrangement is easy to understand.
The first side took me about an hour, because I had to diagnose a couple fitment problems, and then devise the solutions. The second side took me 10 minutes, because I already knew what the problems were, and could just make the adjustments before my fingers were crammed into the wheel well with a flashlight in my teeth.
Modifications I had to make:
2) The diameter of the plastic adaptor was too big to get past the metal housing that it needs to clip into. Taking this piece to the bench grinder, I took a 1/16 off the diameter (basically a 1/32" pass all the way around). I also made the tabs slightly narrower, particularly the wide one, and shortened them by 1/32" while I was at it. (It's the thickness of the tabs that secures them in place so reducing the other dimensions just made it easier to get things in place without compromising the fit.)
1) The orientation of the LEDs was such that the bulb could either be locked into place, or oriented vertically as it should be, but not both. To fix this, I removed the small Philips screw just above the fat o-ring on the bulb. This allows the plastic collar with the small tabs to rotate on the bulb. One one bulb I was able to rotate the collar 45 degrees and retighten the screw in it's original hole. On the second bulb I had to remove the collar, drill a new hole for the screw 45 degrees from the original, and reinstall it using the new hole. This may not be the case for all bulbs, since it doesn't sound like the others had this problem.
The end result is good. (lights are bright, cutoff is really sharp, light distribution is much wider than stock so side visibility is way better, with very evenly spread light pattern, visually, the low beams now match the DRLs, which was one of my main peeves)
However, there's no reason this project should be this complicated. Would I do it again? Not if I could pay $100 for a direct-fit version (like the Lasfit kit linked above) and get back an hour of my time. But if I knew exactly what the problems and solutions were, and had the means to fix them (as you might after reading this thread), I'd probably save $50 and get this mickey-mouse arrangement again. If you know what fixes to make before you start, it's a 20-30 minute job.