Well, after a few(ish) months of foot-dragging I finally made it over to master tradesman SCompRacer's house to start my soldering apprenticeship. I even had most of the parts needed for the mod! I'd been thinking about it for so long I was certain that I had all my caps in hand, but found out at the last moment that I was missing a handful (The 2200uF Nichicon FGs and the 470uF Panny FCs) for the power supply. As such, the full modding will be done in two parts.
What I did bring to the modding party was a Hakko 808 desoldering device, which has a trigger-actuated pump that removes solder through a hole in the iron's tip. It's a pretty nifty tool, but there were still several holes in the PCBs that weren't easily willing to be cleaned out. Rich has a patient hand, fortunately, and the mod went smoothly if slowly.
The main difference in our approach compared to the previous documentations (especially those of George and Brock) was how we installed the two "local power supply reservoir" caps for each opamp: Both George and Brock mounted the two 120uF Panny FCs on the underside of the board. Please read and view the description/pictures of Brock's posts 115 & 116 on page 4 of this thread to see how they mounted these caps. I decided to try to do the same task in a different manner, one which Fred (FTGV) suggested would work as well in words/pictures in post 248 of page 9 of this thread. At the time the soldering iron was hot, I was actually working from a months-old recollection of the pictures from that post as the forum disappearing-photo bugaboo was still in effect. The key thing (just as with the other method) is to make sure that the polarity of the two 120uF caps is correct with respect to pin #4 (neg) and pin #8 (pos) of the opamps.
Here's two shots of the analog board: The first half-completed, the second after completion.
So how does it sound? Well, in a word it sounds great. Right off the bench it sounded really, really good and I've had it running for 80+ hours and my rig sounds better than it ever has before. I'm super happy to have done this and I'm looking forward to completing the job with the last few power-supply caps that I now have in hand. If replacing them makes additional audible improvement, well, I guess I be that much more happy!
Special thanks to all those that have made this possible: Rich for his workshop, experience and steady hand (and for razzing me at every opportunity until I committed to a date to get this done), George and Brock for documenting well both how to do this mod and for making it clear how pleased they were with the results; and finally to Fred, for sharing your knowledge and insight--your generosity is noted and appreciated!
I'll snap a couple pics of the other board when I get around to completing it--don't hold your breath, school starts this coming week!