Good reason to have regulators for single tank and double tank diving. I'm with RJP, switching between single tank and double tank setups is a <1 minute task.
Not that this is worth you or me arguing about....
.... but if I dive tech here in Palm Beach, even in summertime, we have thermoclines on half the days we may go....it can be 80 degrees on top, 55 degrees at 250 feet.
So I have to use a drysuit.....My drysuit with the right insulation requires quite a bit of harness adjustment from my 3.5 mill freedive wet suit, which I use all year in Florida for recreational dives. So figure each time I would have to switch from tech to recreational, or back, it is more like a 15 minute pain in the butt I don't like screwing with....Plus, once I get a harness and rig set up perfectly for trim and fit, I REALLY don't like changing this adjustment for any reason..having the separate bp/harness is a small amount of cash, and the investment ( the harness and plate) will last forever. You already have the singles wing, if you are now in doubles.....If you began as a new diver with doubles rather than a single tank set up, someone saw you coming and caused you to make poor choices in what you should start with. Double tanks are a huge mistake for diving in most great dive locations around the world, and this is particularly true in South Florida.....90% of our dive sites are 90 feet or less, and you only have an hour per dive...you use professional charter boats that run 2 trips a day or more, and there are no 2 hour long dives on recreational boats, and the boats are not designed to carry your 2 sets of double 80's for each doubles diver....and if you plan on running 2 dives with one set of doubles, now you are likely to get a shorter dive than many of the recreational divers ( who would be using a hp100 on a 90 foot dive). Use double hp 100's and your rig is too heavy, and you are diving foolishly overweighted for Florida diving--especially for 90 foot dives.
Diving doubles on a recreational dive means you are pulling so much drag with you, that your cruising speed is pathetically slow--and you would not easily be able to keep up with fit friends on single tank rigs, out for a medium paced cruise style dive. You'd be fine on macro dives--which I hate......and you do way more work lugging the doubles around between boat, shop for fills, and garage...... I see doubles as an evil I can't do without on a dive deeper than 140 feet.
I am not using them for standard recreational diving, and I don't think it is an intelligent practice for recreational diving.
