Hi - from reading threads here (and a few prior trips), I'm looking at RainbowReef and HorizonDivers for a short trip in a few weeks. I've enjoyed the Duane and Spiegel Grove on prior trips, though I've never done a double dip to one of them. So a couple of Qs' - does a double dip turn out to be not-so-great due to limited depth time on the second dive? And does flipping the order and doing a deep wreck in the afternoon (like Horizon offers) result in limited bottom time due to residual nitrogen from morning reef dives? Or has that mostly off-gassed by the time the afternoon dives start? I'd be diving nitrox, for what it's worth...