I am completing a mooring on a small lake in New Hampshire for my new (to me) O'Day 20. The location will be in 10 - 15 feet of water. Based on input from a harbormaster at a local yacht club, I will be using a 100 lb. mushroom anchor, 7 feet of 3/8 bottom chain, 15 feet of 5/16 top chain, and a 24" buoy with a pendant that will clip to the forward "trailer hook" in the boat's bow. I have received a lot of conflicting advice as to how to connect the pendant to the chain. Some say to attach it to the top loop in the buoy, some say to attach it to the bottom loop of the buoy (where the top chain is attached), and some say to attach it near the top of the top chain. The challenge with the last option is that I would have to use a pretty small shackle (1/2 inch) to fit through the top chain, and that seems to be a weakness. Any advice would be greatly appreciated. Thanks.