I always thought about the old books my dad had which showed scrach builted. This is mostly cardboard so far execpt for the braces on the sides. Its HO scale I think it looks ok, I will probably need to make a bunch before they look like I want them to. I will post more pics when I finish this one. I used Autocad to make the drawings on thick paper, then embosed rivits on the paper, flipeted it over and cut it out. Then I glued the paper to cardboard and the plastic braces to that.