They also dove quad configurations. Instead of diving with hung tanks, they banded them. Offten the center tanks were upsidedown in the pack, and it was done for the simple reason that they needed more back gas. We dive a diferent configuration now, but THAT was pioneering our sport, and I have not a comment to make about their gear, or style of diving. Im too thankful to them to bash them for what they did to bring this to all of us. As the years have gone by I have seen some pretty odd things come and go in the diving industry, and for a long time I avoided theose "cheap looking single hose regs" I see by most of the responders here that in large, there is not a great deal of experience in the sport. But keep an open mind, things will change in your time as well. trust me, it evolves almost daily.