Outsider input, just use IGT, and add them up, but use a SS video as proof/submission and replays. This is the way Mike Tyson Punch Out does it, and some other games. If it really comes down to fraction of seconds, it is easy to load up all replays and take an accurate meassurements up to the fraction of a second.

Indeed using RTA is a really, really, dumb move, better pc = better time.