Added a piece of tin to the center, bent in a V and angled back slightly. The tin was salvaged from the back of some old steal shelving. Guess I'm getting back into the 70's with saving the Planet, as a friend reminded me of the 3R's Reduce, Reuse, and Recycle. I am definitely Reducing my Junk Pile and Reusing it to build this Truck (providing it doesn't turn out a Pile of Junk too, but I'm liking it so probably not). As for the Recycling, well I'm saving the scraps, if I don't find a use for them, maybe I'll melt them down and make something of them. Reduce and Reuse definitely preferred as it costs our Planet less energy.