The frame is 1" x 2" x 1/8" wall tubing. I had looked at some cabs and alot of pics, I made several drawings and it is looking the way I wanted it to so far. It is hard to build without plans but it can be done, just takes longer.
I will post more as I get closer to the end.
Wow, nice job. Have you been using cardboard or something else for a template to get such a nice fit on the steel, though I think it could be a little windy