[Jeff K.]

We used blocks of abs that were mounted to the back of the plywood with some machine screws. They fit into 2x1 aluminum tubing we welded onto the side of the chassis and then we drilled a hole vertically through it all and held it in with a clevis pin and a hairpin cotter pin. For the front and back, we drilled 2 holes that the pins went through, so the pin took the place of the bolt. Looked cleaner and was easier to remove for doing maintenance and inspection. Didn't have any problems and it held it nice and snug.