I think the real issue here is that I really need a frame perfect rip of NTSC GOUT to use as a reference. I used v1.0 as a guide and only changed those frames that differ between PAL and NTSC GOUT.
FWIW, I use v1.0 as a guide for the GOUT sync of the subtitles ref, so if you make adjustments from 1.0 in the first half hour, they will need to be applied to the synced subtitles ref too.