Well I did it. i cut out the floor of my 25 Donzi, removed the engine, 65 gal gas tank and have torn out all of the fiberglass and foam. Wow was it full of soaked rotten wood. Now I am down to the bare fiberglass. need ideas to rebuild the stringers and cross members as far as materials and tips. Not enthused to fiberglass back in 3/4 plywood. Heard some have used foam to make the molds and use fiberglass to rebuild the stringers that are lighter and will never rot.