If I end up making an alternate version, most of the loud in-your-face '93 additions will still be taken out, but the ones that don't stand out so much will be left in. Certainly all the ones that came from the mono mix would be retained. This will also allow greater retention of dynamic range by not having to substitute sources except where absolutely necessary.
But whether I do a track like that will depend on whether I can obtain recordings of individual sound effects from the mono mix. I'd really like to put in the deceleration effect when the Falcon comes out of lightspeed and the whining machinery sound when caught in the tractor beam, as well as some other things, but I don't know if there are good sources for them. Does the Sounds of Star Wars book have those effects? I can't take them from the SE's because they're mixed in with other sounds. I'd probably use the '85 mix to put in 3PO's tractor beam line as well, but I'm in two minds about closing the blast doors: I know many people like this line, but I myself don't care for it. I first heard it in the SE and have a hard time accepting it as 'genuine', even though I know it is; plus it just seems unnecessary. Have to think about that some more.
That music echo in the '77 stereo is rather strange, although it does have an interesting effect. I guess it's an early use of the surround channel in Dolby Stereo, but perhaps one reason they made the '85 mix was to tone down this element. Since it's delayed compared to the front channels, I don't think it would affect the imaging much, but I'm not sure.
I now have the lossless LFE from the Bluray, so I'll probably be using that where I can, but since most of my 70mm bass comes from the '97 mix, for which we only have a lossy source, it will only affect a relatively small portion of it. But I think I will use the lossless bass for the other two movies also, and for them I can most likely use the whole thing. Well, almost: it turns out that the volume of the Bluray tracks is pumped up so high that the loudest bass is actually clipped, which is completely ridiculous, so the lossy versions would still have to be used for those parts. Incidentally, while I don't have the entire 2011 mix for ANH, just from looking at the LFE channel I can immediately tell that the vast majority of the movie sounds exactly the same as the 2004 version—there are only a couple minor differences, which is exactly what I'd predicted. So the Bluray is still the same messed up pile of crap as the dvd for the most part.
For anyone who's interested, take a listen to the '93 mix when R2 gets blasted by the Jawas, and listen to the rear-channel echo just after this. Now listen to the '85 and '77 stereo mixes: hey, that sound's not there! It isn't in the mono mix either, but it is in the SE's. Is it a '93 addition, or was it part of the 70mm version? I can't decide. The in-theatre 70mm recording doesn't seem to have it, at least not the one I have, but then that recording doesn't seem to have any of the surround effects at all, so that tells me nothing; also, the mono version completely omits everything that was in the surround channel of the others anyway, so again that's inconclusive. There's another sound like that during the shot of the Millennium Falcon in hyperspace, a sort of 'backdraft' or something in the surround, which is only heard in the '93 and no other. Again, I have no idea whether it was a part of the 70mm version or not. What to do, what to do . . .