Definitely reinforce that chain plate in the pic. Then if you have not already check all the other ones and reinforce as necessary. Mast plate looks ok in the pic, I notice a bolt there and I am guessing it used to have a Tabernacle Pin. Mine originally had the pin and I broke the pin lowering my mast once. I replaced it with a stainless steel bolt, washers and a nut. So far it has not given me any problems. You may also want to get a bottom job on the boat soon. Your first time out with her, make sure your retractable keel is working ok and when you first lower it pay attention to the line
. If you notice any weak points on it replace it. You don't want to be out there, lower your keel then can't get it retracted back up to get your boat back on the trailer.