I think I used 3/8ths marine plywood on mine. I had to route our around the bolt heads for the seat latches. I used oval head screws and those funny washers under the heads to spread the load a bit. The red tablecloth is attached with 3m spray adhesive and wrapped around the backside to get pinched like chili's I guess. I cut the access holes a size that lets me use the stock rear access panel covers. I remember spending some time on the rear deck lamp too.