First thing first, thanks for the timings! Now, to clarify and discuss:
Counting track tiles is a bit confusing, so describing the place where a .rpl ends is easier and clearer, using photo shoots in case race is tight.
About penalty (considering we are measuring distances and not time), the best is probably a tile penalty. Somewhat about a tile per second, after a 20s threshold. (if we decide to count tiles)
If not, maybe a time penalty ending the replay earlier. For instance, 20s penalty per minute late, so an 8 min replay is rewinded to 7:40 and measured there
What do you guys think?