I thought I added this yesterday, so will anyway- and on the other page.
I used the piece of paper and folded it around to;-
....show how a flat piece of 1/16" (1.6mm) sheet would look before folding, but if I had to make them, I'd use a bit of 1" SS RHS and fettle/'humour' the folds
I'll post in in your other thread too...when I find it