That doesn't solve the problem, in the general case (it might work acceptably well in practice, though)

if your controller has such loose timing that you can't match a 10ms window reliably, you're doing something very wrong. '

Match a 10ms window how far away from your last sync point? Every clock has a drift rate.

I get where you're going, but also consider the level is 17 seconds long. It's not unreasonable to think he just ran it a few times until the clocks decided to cooperate.