Damn, I wrote out a whole long post and then my connection completely crapped out and I lost it.
Anyway--naturally I downloaded and listened to these as soon as I saw the thread. Funnily enough, I'd just been reflecting the day before on how I'd probably never get to hear this version, and what should happen next? lol
As I'd suspected, the ESB 70mm mix turns out to be almost completely identical to the 35mm version. So much so that I pretty much think there's no point in trying recreate it unless you do the video editing to go along with it. You've got the significant dialogue differences with Lando in the last scene, and it's missing the tracked music due to some special effects shots not being present (making the sound work here would be rather difficult because of all that), but aside from this one scene, there are only occasional minor changes in sound effects to show that it's even a different mix at all! My current 5.1 will give a sound very close to what this would have been for the vast majority of the movie. ;)
I always thought the notion of all those extra SE lines and such coming from the 70mm to be based on faulty logic. Why would all those things have been there originally and then deleted? Turns out I was right to doubt it!
It was really great hearing the reactions of the crowd to the movie. Thanks so much for posting this, morgands1. And a late thanks also for supplying the SW recordings a few years ago--never could have done my project without them. :)