I burned a few copies.
The Obi-Wan scene was too quiet to my ears, so I'm reencoding the disc now with a louder Obi-Wan. I had to boost it as high as possible, and THEN add a filter to boost it further.
In general the music and effects are too loud compared to the dialogue on the 2004 mix, so I keep having to bring the dialogue up in quieter scenes.
This also allowed me to fix the sync on one Luke line that I'd missed. I hope there aren't any other sync errors I haven't spotted - I'm not planning to just sit down and watch the movie all the way through.