Well, if you don't hear from me on this for a while, I'll be giving the following a whirl:

Remove the Dingo scene, have the only English soundtrack be the mono one. I am sticking with 1.66:1. I'll see what I can do about dubs & subs, but that's secondary.

This could take a long time. I'm in no hurry and am learning as I go. If all goes well, maybe I'll try to re-yellowify Do the Right Thing, who knows... Basically I'm looking at movies where the video quality is already damn near perfect on the Blu-Ray except for one little easily fixed issue. Suggestions welcome!