What I'm doing now is this...

DVDfab to rip the BD onto my hard drive in a folder structure. i took the main movie's .m2ts file and stuck it onto my other drive and have put it into a Premiere pro timeline.

I rendered it, which has solved the playback issues.

I am now syncing the PCM audio from the laserdisc. The 5.1 remix is a mess and laughably out o sync at tims. Amateur hour. Thankfully the lasersisc audio lines up nicely after a while and then neds few adjustments.

I'm 90 minutes in.

What to do when I am finished? No idea! I'll cross that bridge when I come to it this weekend.