Checking the audio on the OT Blu-Rays, the 7.1 mix is nothing more than the crappy 2011 6.1 mix with the original rear centre channel duplicated to make it 7.1. And that channel may as well not have been there anyway because it contains about 6 effects throughout the films and complete silence in between.
Ripped ROTJ to my drive ready for me to start work on it. The frozen grain is horrendous. Also the DNR has been applied way to heavy in some shots resulting in a completely unnaturally smooth image. But in some shots, there are large blobs of noise/ grain in the dark areas. For example, just check Vader’s body as he walks down the ramp at the beginning of ROTJ