I built this bed over a year ago. I used 14G for the tool boxes, 1/8'' deckplate for the floor, and 3/16'' for the workbench. mounted just under the bench is receiver tube so I can put the vice on and off. I lost the pic that shows the rear of the bed, but I have a 5hp gas air compressor mounted in it. The welder is a Miller trailblazer 280. I could only work on it part time, so it took me about 2 years to finish.