I finally had good weather to do my first oil change and thought I'd add a few comments. (...and lament a couple of things...
The trashbag idea for minimizing the drain plug deluge was abandoned in favor of modifying the following funnel by cutting off the end, ensuring the opening was at least 1 inch in diameter. It worked perfectly. I was able to hold it under both drain plugs (and the filter housing) to direct the flow into a ~3 gallon bucket.
I also wanted to point out that one could use a t-30 bit for the majority of the belly pan screws in lieu of a 10mm socket. The tools list should include a t-25 and t-30, if you choose to go that route. The advantage here is that you can use a cordless drill (variable speed, of course) to remove and reinstall the screws rather than the slower wrenching method. This does mean you'd have to be careful not to over-torque them. (Those pictured below are for a 1/4" drive socket, but torx bits are available for drill chucks too.)
On a less positive note; my heart just sank when I saw the condition of the filter, and the sludge that had accumulated inside at the bottom. I'm seriously worried about the health of this engine now. The previous owner clearly neglected it in stellar fashion. I may try to find a lab of some sort which can analyze it for me and tell me what it is. The bit I scooped out with a screwdriver looked like bearing grease.
The filter itself looked pretty bad, as though whatever moron installed it didn't put it all the way in the canister housing, shoved it on, it bound, then twisted...
This is pretty bad...
In all the countless oil changes I've performed on my other vehicles over the years, I have never seen a filter in this condition.
The other thing I discovered is that my rear belly pan is missing the NACA duct pictured in the second photo below. Do all Tregs have them? What is its purpose? I looked above the belly pan in that location and didn't see any type of tranny cooler or other device which might be fed by a NACA duct.
Photo from this thread
-Hope the first part of this post helps someone... As for the rest of the post...well...input is appreciated.