Tack said:

"This is ridiculous…"

Yeah, I can certainly understand that this may seem "ridiculous" to most people but I personally find it quite fascinating. It's about ILM'ers still working on the film when prints were already being struck in order to improve on what first came out of the optical printer.

These visual effects artists didn't have the luxury seeing how the shot came out until it was done, they basically had to hope for the best. If there happened to be a mistake in the compositing then they had to live with it or just start from scratch.

While the revisions on the films audio presentation has been well documented over the years, these subtle last minute visual revisions have gone undocumented, no mention in any behind the scenes interviews or books as far as I know, so I think it's nice trying to document them. In this case it's not about Lucas being his usual tinkering self either, subtle revisions on films during their theatrical run wasn't something unique for Star Wars.