[mototodo]

I made the base for the deck out of two sheets of 8" x 18" steel trimmed to 7 1/4" which is approx 102" scale. The sheets are attached to the chassis rails using small bolts. I framed the steel with angle aluminum. The angle aluminum was a little thick for scale so I shaved 3mm off of one edge. It was laborious but I am happy with the thickness now. I cut a sheet of 1/4" MDF to fit inside the frame. The lip of the frame protrudes 1/16" above the MDF to leave room for deck boards.