countryboy:It's not just a gear swap.... but a complete removal of all gear (even mask, fins) then donning the gear while buddy breathing.
We did not swap each individual piece..
So after we doffed ALL the gear, swapped masks, we still needed to [find] collect the gear and don. While buddy breathing....
From some of the posts it seems like you swapped items one at a time... Just wanted to clarify.
Had a bash at this in the pool as part of my DM training. Is a stress test designed to make you think, control your breathing and basically see how you do in the water while buddy breathing at the bottom of the pool. Was an eye opener, managed it first time but it was getting 'interesting' towards getting all the kit back on. Am gonna try it again some time soon. Good experience.