My two cents on the filter change:
Getting the airbox to close was tricky only b/c it took me a few minutes to figure out that the reason the two sides of the box didn't seem to want to align was because the inner hinges (the ones visible from the engine bay) don't readily come back together again after they disengage from one another.
So, once I could see the problem, with my right arm in the wheel-well pushing the box inward and with my head and my left arm in the engine bay guiding the inner hinges together, I found it only took a couple of minutes to get everything to mate. The key was watching the inner hinges to see how they responded to pressure.
Once the inner hinges were properly aligned, the airbox went together and the two metal clamps holding the outside faces together were easy to push back into place. I could tell everything was properly aligned when the plastic tabs (as shown in GoElise's photo on page 1) on the snorkel-half of the box didn't need any pressure to slide into place -- they go on the outside of the housing on the intake-half of the box.
FWIW, I elected to keep the snorkel and stick with the Toyota paper filter. For $14 a pop, the stock filter's a cheap solution, the filter works great, and I never have quite trusted the filters that require oiling anyway. After some 8K of super-clean highway (to/from various tracks) and track driving, my filter was remarkably dirty. I doubt the dirt was creating any restrictions, but I can't see the filter going 30,000 miles, as recommended in the service manual, particularly those of you who find yourself on a gravel road once in a while.
Hope this helps. Thanks, all, for sharing your experiences and to GoElise for posting pix.
Twin
PS: and "yes", Jack, we know you have a supercharger...
