Interesting thead thanks folks! I have an '84 381 that was hauled in Sept, no apparent water issues or gaps between the keel and hull but I have seen a minor issue with the head door (top right corner) which I sanded slightly to make fit. The comment about the stay aft of the mast is thought provoking. How would I tell if adjusting it could solve the squareness of the head doorway? Do just start adjusting tenson and check the doorway for square?