I used marine grade plywood there are a few grades of quality and for the floor if you use epoxy and first wet it down with epoxy to soak in you could use the cheapest quality out there. But I would stick with marine ply because of the glue and plugging up the holes on all marine grade plywood. It seems that the higher the number of lamination ply’s of the wood increases the cost of the stuff.
FellowShip
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My motto: Just for the Grins
