I have a '95 300 Sundancer that has a leak in the aft cabin during heavy rains. It appears that water is actually seaping in on the back port corner of the cabin through the fiberglas during hard rains. Additionally, I have drips coming through the 2 screws holding the ceiling fabric up in the aft cabin at same time. I'm wondering if all of the water is coming in up there and perhaps traveling over and coming through the fiberglas flooring? Help!