Need I say this? This is a disaster waiting to happen! Each of the wheels is entanglement hazard, not to mention the handle. Why would you add more weight to what is all ready a heavy set up? This is designed by someone who does not dive doubles very much, if at all. There is no up side to this, and a slug of down sides. There is the real safety issue of points of entanglement. You are inviting trouble with this rig.