I'm in California and I am refinishing an Islander 55 sailboat interior. Only a few of these hulls where built back in the 70's for daysail racing with limited interior space. I'm doing some structural repairs and rearrangement of cabinetry etc. After removing some paneling and bulkheads I found serious fiberglass delamination at the bulkhead joints and cracking along the inner deck seam that was obviously caused by flexing or rigging stresses. The deck to hull seam had been repaired with fiberglass mat once before according to the previous owner. I am considering thicker deck beams but head room is scarce. Has anyone had similar problems and/or repair solutions? Thanks. posted first Aug. 21/13.