I have a 97 silverado 1500 that going to be my service truck. I'm building my own flat bed 7' wide & 8' long. I'll be hauling a bobcat welder air compressor torch set & a toolbox up above. Now what the best material to build the frame out off. I'm thinking of 4" channel perimeter. Think I can get away with 1/8" thick. & 1/8" diamond plate. For the skinning ?