Built one of these recently, very happy with it. It uses the ProTools 105 die sets. I currently have 1 and 5/8" and 1 and 1/4" die sets for it. You can find a ton of info on these benders by searching "gottrikes bender" on the Pirate4x4 dot com website/forums.
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1969 Camaro/ Tom Nelson TT 434 / Wayne Due C5 / DSE QLink / and a bunch of other stuff...