Thanks Rick. I do have the inserts, but unless I pull each of them out of the tube at least half way, the tube will fall off. I fear that the hulls have separated at the bow end. In other words, the bows may no longer be parallel, but wider at the bow end compared to the stern end. Why else would the bar have fallen off? How can you tell if the front crossbar is seated all the way into each hull? How do I keep the "jib bar" from falling off? Should I pull the inserts out far enough to keep the bar on and caulk them there?