UPDATE:

Thanks to Neverargreat’s nudging, I’ve desaturated the greens in several places. I need to render out a test video to make sure I didn’t destroy anything on Hoth, where I applied it pretty generally across most of reels 1 and 2, but… I now have the end credits fixed, and I’m now cropping out the black bars and very very slightly adjusted the aspect ratio of the film. I’ve also learned how to put ALL of Harmy’s audio tracks, and chapter breaks with the video, and the video is now being rendered out at “High” level, profile 4.1 for blu ray compliance.

It just doesn’t make sense to me to make an iso, but the mkv will be under 25gigs and you’ll be good to cook your own easily enough.