I dont even like doing stage bottles like that anymore. It will work, clip the bottle to upper and lower d rings and start swimming but it bounces and hangs down too low. A much simpler way to rig stages and way better is to make a 6 inch loop out of 3/8 bungee and add a boltsnap to it, then secure it to the neck of the tank. Then pull up from the bottom 15 inches and secure another 6 inch bungee loop with boltsnap under a radiator type clamp. You can then pull th boltsnaps to connect and it holds snug to your side. This is how sidemounters like myself carry stages outside of sidemount tanks. How do I rig my sidemount tanks? glad you asked[in case anyone does] I have a hogring on each tankneck, installed while valve is off, and a double ender connecting there to my upper d ring. At the bottom I have 2 radiator clamps that hold a large quicklink that has a large boltsnap connected to it and it clips off to a DR buttplates door handles. If clipping ff the bottom is a big pain due to having short arms, a big butt or not being too flexible, a short bungee could be added there as well, like the stage rigging I described, so it can be pulled to clip off and still be snug to your sides. On my sidemount tanks, the clamps are way lower on the tank bottoms than on the stages, so more of the tank rides up improving trim.