The first main set is really just a long warmup or lead-up to the second main set -- the challenge set. We did this challenge set about two months ago, and I had a record of the sendoffs that everyone used back then. A couple of swimmers tried a faster sendoff today and succeeded, which was really cool. One tried a faster sendoff (after a long layoff), and didn't make the challenge. Others used their previous sendoff, and had a really strong set.