Here is a rack that i built to be able to carry some things and be water prof and could be locked if needed. The frame is built of flat stock 3/4 by 3/16 steel. I used heat to make the bends and welded in cross braces. I used two 30 cal. ammo cans mounted low with 3/4 inch spacers. The alum. cover is to cover the rack and act like a finder. I also built a rack useing a 50 cal. ammo can that i gave to my son to use on his Electra.