With the frame shortened, we tore the bed apart and shortened just the bed sides by 12 inches and removed the inner supports to lighten things up a bit. To bob the sides, just mark two parallel vertical lines with tape and cut out the middle section. Then spot-weld the halves together. Leave an inch between the welds to get a warp-free finish. The bed sides needed some hammer work to get the body lines just perfect, and then the top inner edge was folded over to get rid of any sharp edges.