As I plan on building many of these cars, and they must all be exactly identical, I have to start with an absolutely flat, true, square, level, solid and repeatable surface. To that end I designed this chassis jig table out of 3″ and 4″ x 1/4″ steel C-channel. Over 500 pounds of it. I initially started the gardener off cutting steel, and although I told him it had to be perfect, 45 degrees seems to mean anywhere between 43 and 47 degrees to him so that didn’t work.