Rigging question re: 1983 O'Day 28. I'm not sure if other O'Days from this period are equipped in a similar fashion but my boat has what I call a Boom-to-Main Pivot Block that attaches the boom to the main. It's an odd piece of hardware. It's 2 pieces of round plastic (about a 1 1/2 inches in diameter) that have 2 metal clips that fasten it together. It is then attached to the boom and then pivoted into a receptacle on the main. This locks in to keep the two fastened together. I was wondering if anyone has ever seen one of these pieces available for sale? Unfortunately, after years of worrying about losing the piece, the boat yard lost it this year.