I remember reading something about this in the Practical Sailor review of the J/30. The stated something to the effect that "the bulkhead on the J/30 was re-engineered to prevent the problems that were common to the J/24" The two problems that I know of in the J/24 are the bulkhead coming loose from the hull and rot in the bulkhead itself. On a related note, I was part of the group that toured the TPI plant during the J/30 North Americans. They have a new material from Pennske (I believe) that is used in the deck molding in the area of the chainplate perforations. This material is much stronger than the balsa to resist deformation and also is waterproof.
