The 1/4 inch thick floorboards were completed by a previous kit owner; likely not the "marine grade" plywood mentioned in the manual, as the pilot's side floorboard is warping. (Will consider a redo later). Both floorboards mount to tabs underneath; the trick is locating those tabs and the holes already drilled in place by the factory. Hobby Lobby sells plastic laminate sheets, 2' X 3' for $4.00 each. Used the existing wooden floorboards as templates, cut out a laminate "floorboard", and then put it in place instead of the wooden piece. Easy to trace tabs and holes on the laminate, which now will be the template on top of the wood to drill the mounting holes.