Sorry to go against your note Gayle but I'm just really concerned that we'll end up with a bunch of incomplete replays if folks quit after crossing the finish line. The advice towards the end of your post above is spot on....make sure you checks your replay before submitting.
The lap is short enough that I believe a safer way would be just to do a complete lap after you've set your fast time. The lap must be absolutely clean and when i say clean I mean according to the game.
Didn't mean to cause offense