Looking for some cheap plywood to finish the siding on my trailer. Could use full sheets or scrap depending on what size. I'm thinking 1/4" for the sides and front and 7/16" or 1/2" for the floor and tailgate. Sides (1/4) I need 2- 30"x54" front (1/4) 30"x43". The floor (7/16 or 1/2) needs...