Mike, I did not have the plasma cutter when I did this, I put a new disc on the 9" Milwaukee grinder, laid it flat at the angle I needed and just kept going back and forth, then finished it off with a big file. I used 60 degrees because thats what most people were using when I read about press breaks. I bent some 1/4" and it will bend a little more than 90 degrees, I was not sure how much the work piece would spring back if any? I plan on getting a 20 ton air over hyd jack for it someday. I probably should have just built the press after everything I did to it?