pipe benders work differently than tube benders - HF stuff is for pipe. You might get lucky for a bend or two, but doin a whole cage or big project will end up costing you a lot of steel. Pro Tools will give you the design for a good tube bender - hoping you'll buy their dies. Otherwise, I've got the plans for their bender or a couple different designs. About all end up costing a couple hundred to build ($much of that is the die and follower and a hardened pivot pin) - if your friends with a machine shop, they can build the dies for you a little cheaper or if someone here has a line on cheaper dies...