Recently bought a 5x8 utility for use in my biz. Has the 1 ft high angle rail like usual, with 4 stake pockets available. I am interested in building 2 ft high sides for the trailer, to make it more useful for hauling mulch, landscape rock, debris from trim jobs, etc. Has anyone done this recently, and if so what are some basic directions for good, sturdy sides on the 5x8? If you have pics, I would be indebted My thinking is to cut some 2x4's to fit the pockets and then bolt to some cut-to-fit 1/2 inch treated plywood. Use L brackets to join the corners between the 3 pieces of plywood. Then either use U brackets to bolt the plywood to the rail, or drill holes in the rail and bolt the plywood on directly. I don't want to have to drill holes in the rail if I don't have to, however..... Thanks!