Question for ya! What do you use to bend the metal, and where did you buy it?
Thank you and TopDogZero was right sheet metal hand brake 30'' from PrincessAuto, actually pretty cheap. Although it says you can bend 20 gauge but not 30", we'll see how it does on a 20" piece in the next couple days. Clamping in the middle of the sheet is the problem it wants to push back giving a slight arc to the the bend.
Well I did some modding to the hand brake to help with cleaner bend radius. First drilled holes for pins just using bolts to keep clamping plate from sliding back. Then welded plate to bender angle iron to keep it from flexing back.
Bent up 20" 20 gauge back panel and it worked quite well, no bow and constant radius.
Third pic shows test fit in fixture, used to keep everything square and parallel.