[frank beuker]

Bill,
I use cardboard what they use for making passapatoe's (the ring around a painting)
it's hard and about the same thickness as the alu and easy to cut for bends

I've got a plumbers chears (for cutting ) and a plumbers foulding bench see pictures.
And for some corners i use the welder i started this week with welding alu it's hard but with practise.......
And after welding i grind it off and looks like as if it's one piece.
But still a much work

Frank