...What's new since:

EQ's: mostly 1993 sessions mixes tracks, using a 20Khz parametric equalizer to manage the 20Khz tone that is particular to these. Overall, the CD3 from the AE has been the main reference for new EQs. A lot of tracks from it then replace the previous CD1 & 2 ones.
Pitch corrections: 5M4/6M1; 6M3; 7M3; 9M4 + 1M2 Alt this one checked against the 1980 film mix)
Balance adjustment on a few tracks
New source occasionnaly used for enhancement: the NPR Radio Drama for 6M3; 10M1
Redone tracks: 6M2 (uses the film mix instead of the SE remix); 9M4, 1M2 Alt.
Editing: checked and corrected when needed against J Williams piano sketches manuscript (scoring sheets).
Other improvements: notably 8M2, bringing back the background details (xylophone(?) harmonics) from the sessions mix during Luke's vision passage.

+ A few other details.