Finally have the sunfish dried out and ready to attempt repairs. Found two holes in the hull, both of them seem to start at the edge of the cockpit, and spread out from there. Looks like there is plenty of room between the outside of the hull and foam block, except for where it butts up against the cockpit. How do I put a backing in that will allow me to fill the hole, stay firm to the edge of the cockpit, and still allow flex in the area away from the cockpit? Looks like previous owner had it filled with some type of bondo, and the crack just came back, I'm guessing because the material did not allow for flex.