I'm finalizing the purchase of a 1995 Hunter 336. The survey found that several of the lifeline stanchions are wobbly and need to be remounted. My initial inspection leads me to believe that there is probably no access to the mounting hardware from below. Can someone tell me how these stanchions are mounted? The current owner thinks they use machine screws threaded into nuts that are glassed into the underside of the deck, but he's not sure. Any insight would be greatly appreciated.