Citizen, just a couple of issues you should be aware of when you come to do ROTJ. The French laserdisc is missing a screenwipe from the end of side 3, so you'll need to use you German discs to fix that. It occurs just before the first scene with Wicket; however, it's nowhere near as bad as the missing section from ANH.

The other issue that caught me out was that the position of the letterboxed image takes a shift down somewhere in the middle of side 4. I'd seen a little shift before in the Ben/Canyon scene in ANH side 1, but this is quite a large jump of about 10 lines or so.