I've downloaded it and watched a bit. What a great find and the quality is pretty good for a 16mm reduction print. Good idea for taking out the chroma.
I think I may have found a difference from the original version: when the naked hologram is dancing and THX is erm... Enjoying it, it cuts back and forth to LUH, contemplating taking her meds. Was this always the case? I have only seen the laserdisc and that was almost 10 years ago.