Personally I think 1 frame of desync is unnoticable, but if we know there is some desync we should fix it.
By the way I wanted to make bit-perfect audio rips of the german 1993 and 1995 Laserdiscs. I even bought a new LD-Player for this, because my CLD-315 has no optical audio. Unfortunatly the DVL-909 I got from ebay 2 weeks ago turned out to be an asian instead of european model and doesn't play PAL discs at all :-(.