poita said:

Hard to know if the scenes were changed for home release, or if the trailer wasn't colour timed (which is often the case).

Either way, the tool is working well.

That's true, but hairy_hen was at a viewing of a 35 mm print in 2007, and it did not have the red shift, and looked very much like the trailer, so there were at least some prints that matched the trailer. Also the trailer is for the re-release from 1983, so it's likely that the theatrical print was used for the trailer, and not some raw footage, as could have been the case if the trailer was for the original 1981 release.