I know it sounds bad but DIR "Doing it Right" I know people respond by saying that if there not diving DIR then they are doing it wrong. I think the statement of DIR is wrong, but I like alot of there training. Everyone has there gear set up the same, so if anyone is diving DIR then you know exactly how there gear is set up. The back-up regulator is on a necklace around the neck, an idea I just love, because you know exactly were your backup is and you don't have to look for it. When ever you see a diver with the backup in the triangular area it has always fallen out of the clip that hold it, it is dangling down into the reef or dragging in the dirt. When someone is out of air they always go for the regulator in your mouth because they know it has air. and that is the one that I want them to have. My main regulator hose is also 7' long. I also dive dbl tanks. I use to dive with aroung #16 of weight around my waist, which is not the best place to uniformally put your weight. so now instead of dragging weight around that I can't use I use another tank with air that I can use. You can check them out on the world web