Yeah the Max Rebo band sequence looks pretty good. To answer your question Harmy, the GOUT ending video quality looks good.
I could tell straight away it was GOUT unedited but the image quality is above average and the SE editing of the ending is so messed up your solution is probably the way to go.
Looking at OO5's comparison images you'd have to cut between SE and GOUT mid shot to pick up the extra frames that have been left out.