I am about to start on a utility trailer made from aluminum and am looking for opinions on whether im on the the right track or not. The trailer will be 16' long and 6'10" wide. Im going to use 2x5x1/8" tubing for the main frame and the tongue which will be wrapped under the frame. The x members will be 3" channel 3/16". I was planning on spacing the x members every 16" oc. Its just going to be a general purpose trailer hauling anything from zero turn mowers to utv to possibly even light vehicles. Does this sound like im on the right track?