I have a 2014 Bighorn FB3875 with a wet rotting underside of the slide where the refrigerator is located. The water supply line for the water and ice features has been shut off and disconnected for two seasons if not more. With that said I don’t think that’s the source. My problem at this point is obtaining some type of spec sheet or blueprint of how that underside plywood floor is constructed so that it can be replaced. Can anyone suggest anything?