This past week, we arranged to have a custom aluminum leaf box built for my F550 dump bed. I went to an awning business that can do all types of nice aluminum fabrication. (they make big fabric awning frames and can do nioce truck racks, etc...) It will be strong 2" tubing with 1/8" side paneling, all reinforced. 4-corner tie downs to attach the box to the corner D-rings already in the bed.... removable back swing gate (we can double this thing as a chipbox setup.) Top venting with brass screening that gets installed in channeling pieces, so it can be removed and replaced easily, cleaned too. I will make a thread when we get it. It's going to be pretty badass I think and I'm hoping it will be not too bad to slide in and out of the dump bed. We have it designed to fit snug, but with some wiggle room. It's costing 3,000... 7' tall, 10' long, 7' wide Also just bought a new 18hp Billy Goat with extension tubes and hangers for the vac on the dump tailgate. When we dump, we plan on stopping at the shop real quick and using the Dingo to lift off the vac.