Another update:
I've edited the Blu-ray track a bit further, now smoothing out all the edits. Next step: Inserting the EditDroid 5.1 mix to replace the SE parts of the audio track.
Also thanks to _,,,^..^,,,_ and his [OUT ruLes] project I now have an optical PCM rip of the German THX laserdisc. I've already denoised it with Audition and will sync it to Harmy's video track.