J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Cabintop opening for Mast

Don't count on the opening being centered and symmetrical. I found this out when I centered the top of the mast over the bottom of the keel when the boat was out of the water. I poured Spartitite and found the mast was almost in the extreme stbd side of the cutout, leaving a larger gap on the port side. Fore and aft was about right when I set the front of the mast at 3505mm (11 ft 6 inches) per rule 5.7.3