Yes, there's a bunch of cycle counts that aren't exact. I think that it's probably the PTS sensor that's the problem as the cpu runs much faster than the mechanical movement.
Anything's possible, I won't rule anything out 8-)
I keep having trouble with the mx80 and the alignment. I've got the PTS multiplier value set to 1:1 and that seems to fix the graphics, and mess up the text. If I set to 1:2 that fixes the text and messes up the graphics.
Graphic printout with 1:2 (clearly seems to be missing in between columns) at 120x72
Graphic printout with 1:1 (120x72) 120dpi horizontally is the mx80 limit. This looks okay without glitches.