I think we need to move forward to theatrical sync. GOUT sync was a flawed system to begin with, however useful it was. ESB and ROTJ have different frame counts/missing frames depending on if you used the NTSC or PAL versions, and the audio was off by two frames half way through the Jedi NTSC GOUT, which is the one everyone decided to sync to. Theatrical sync has every frame and proper audio sync based on actual film prints, GOUT sync was based on cheap-and-nasty LD->DVD transfers. It was the best we had back then, but not anymore. It’s time to retire GOUT sync imo.
Having said all that, isn’t theatrical sync the same as GOUT sync for Star Wars anyway? I don’t recall any dependencies with Ep 4 other than one frame at the end of reel 5 that was on the DVD/BD but not on any prints or the GOUT so it was omitted.