This means I can now fix a lot of the things I just didn't have the time or patience for last time around. For example, I don't think I ever really noticed that Vader's mask had red eyes until recently, and by then I'd already edited and inserted a lot of shots of Vader, for example during the duel. This meant that to repaint his eyes would mean dropping down another generation of MJPEG compression - it would almost certainly be unnoticeable, but it would have made things very awkward, having to extend inserted shots with unadjusted material.
Now, though, I've been able to write an AviSynth plugin which will do it "live". This means I only need to store a mask rather than storing the whole repainted shot. It also means I need to load less AVIs into AviSynth, which limits me to around 70 inserts, which had meant splitting the movie into three sections.
I've also written a plugin to fix the bad blue screen problems that are occasionally visible during the attack:

I only fixed one or two shots like this originally, but there are a lot more (none as bad as the above). Then I found there were other shots which showed a similar blue glow:

And it even removes the blue glow on the Star Destroyer's engines:

At this rate I may just apply the plugin to the whole movie...
Other new fixes so far include: a corrected aspect ratio for the clock wipe from the Sandcrawler to the Stormtroopers (now implemented as an AviSynth filter), some matte lines around a TIE fighter removed, and a brief shot of Tarkin mouthing something else before he says "Yes?" fixed.
DE