I have a 16' open bow speed boat with a 115 Hp outboard Johnson. I'm renting a house on a saltwater canal and it has a boat lift. I see some boats in the area, and some are hung by two attachpoints on the transom and one on the top of the bow. I have two small attach points on my transom but I don't know if they are for hanging the boat or for towing. Also, I have the ring in the front of my boat that I use for trailering, but I don't know it I can hang my boat from this? Should I just do the safe thing and buy two nylon slings or should I use those attachment points on my boat?