I bought steel ones from Snyders ($90+ and no instructions). When I was out in Denver, Steve Becker told me to make up a little three piece bending die by making the sides to hold it captive and and the shape at bottom with a bolt to hold the end while you pulled the other end down to form it. Trouble is, That you must overbend the piece and I knew it. So I made the form piece/block a smaller, sharper radius (Yeah, I've got this!) But it wasn't small and sharp enough! It wasn't too bad a bend, both pieces together. But it was too large a radius. OK so I'll heat it ! And heat it I did........ Talk about a real mess!Two pieces, two different bends! One with a twist, one without! (And these two pieces have to fit together? I'm convinced that you need special tooling to make that bend. I've been told to get the one piece aluminum gutters and that's what I'm going to do. I'm a former Tool and Die maker and bending light steel is something I've done before.
Terry