Incidentally, I found that when I had one of those "octo ball" secondary reg holders, the reg so attached would slowly free-flow through the ball (for the same reason as you get a freeflow at the surface). I had to pull the reg out to flood it and then put it back. That was yet another reason (other than that they stink at holding onto a reg on a giant stride) that I did the happy dance when I unwittingly tore the ring out of the ball and decided to go with a snorkel keeper instead.