Make that four! I had to resurrect this thread just to join the smallest club on scubaboard. I set up a new bp/w rig and tried it out with some "travel bands" today. This wasn't my first time with two tanks (previously I'd just slung the second) but it was my first dive with a bp/w. I was worried that my trim would be all out of whack, but it actually felt very comfortable and correct. Just lucky with the set-up maybe? I swam along a ridge at 60' for 15 minutes to get the feel for how it maneuvered, then dropped over the side of the wall to 150'. Works like a charm...I need to let the should straps out a couple inches but other than that I don't think I need to add/move any weight around. Anyway, this thread is about independent doubles, not bp/w. I did my homework and read all the threads I could find on SB about this. I see that "travel band" systems get flamed alot by dual tankers, but for many reasons it was the right choice for me, rather than getting fixed bands. I decided to go with the twin system from Ultimate Products Corp rather than the Aqua Explorers model, even though it was significantly more expensive, because it looked like a better build to me and because I have previously used the UPC quick draw pony bracket and like it. So, tech divers, you may now begin your ridicule...