Just trying to wrap my head around the logistics of the first option, I agree it has to be a large time separation, but are we talking 10 plus waves like some races (some have 20+). Strictly broken by 5 year age groups, or larger spreads? First wave at 7 (oe heck, it's light at 6), you're talking hours to get through all the waves?

Doesn't it have to be the second option?