I have a TMNT where the is obvious water damage. The damaged areas are the bottom of the cabinet and the back of the backbox. The rest of the cabinet is solid. Two questions, for the bottom of the cabinet, does anyone know what thickness of plywood I should get to replace the bottom? I need to replace the cross brace that the tansformer sits on, what type/thickness of wood for this? Also, has anyone replaced the back of a backbox? I figure I have to cut the vent holes etc. Not sure of what type of wood to use. Any other issues to consider? Thanks!