I noticed something interesting that sycamore would be intrigued by. I checked the three shots that are different between versions, and the "cloudy" Yavin launch composite is there, and so is the temple composite with the blue lines on a couple frames...but the flash frames when the Falcon is fleeing the Star Destroyer match up with sources like the GOUT and Technidisc, not with the JSC or mthr's bootleg. The flashes fill the entire frame, they aren't "behind" the ships.

Interesting...did reel 3 come from a different IP? (I also see that the subtitle-free Greedo scene starts with a very big and dirty negative splice...)