The problem is that the theatrical stereo mixes have narrower stereo imaging than the '93 versions, presumably to reduce crosstalk when the tracks were upmixed during playback (upmixing back then was more primitive than it is now, so this was a bigger concern at the time). When I made my first attempt at recreating the SW 70mm track, I replaced the '93 added sounds with the '77 stereo mix, but this was not ideal because the shift in the soundstage at the edit points was noticeable. The second version used the '85 mix instead for these sections, which has the full panning width, so this is no longer an issue. It is more likely that I'd be able to achieve a fully seamless result for the snowspeeder crash by using the '97 version than with the '80 as I did before. But the crash sound itself seems to be mixed somewhat differently, in level and duration, in these two mixes, so I'll have to try it both ways and see which works out the best.

In the '80 stereo mix the crash sound is longer and louder, so it sounds very cool, though from listening to the 70mm recording, it seems like it may have been shorter and less prominent like in the SE (though it's impossible to say for sure, since the recording is very rough and fuzzy).

Either way, the LFE is getting a bit of an overhaul, coming from the Bluray this time rather than the DVD, but I think it'll still mostly sound the same as before.