About the keel stud being tight,that was a suggestion from the guy at Catalina Direct. I think I read somewhere that the lead ballast was cast into a solid piece with the threaded rod in place and that rod was then used to lift the lead and lower it into place and then the lead was glassed over. I would imagine,like you,that there is something more substantial at the lower end of that rod. Either bent or a nut and washer cast in place. After all,it was said to be used as a lifting point. If you look up images of a Catalina 18 there is a picture of one being hoisted that way. Years ago when I first got the boat I made a comment to someone knowledgeable about Catalinas about that stud and why there was no nut and washer on it. I was then told that there was a ring fitting to screw on to be used for lifting the boat. As to launching at a ramp that is what I do. Our club has a "ramp". I use that term loosely,very loosely. At the water's edge the cement ramp is buried below about 3 feet of sand at that point. It seems that when it was built they failed to see the need for a bulkhead on the sides. So,I am essentially launching from a sand beach. Even so,I do that successfully every year. And,after all,the C 18 was designed to be a trailer sailer. Good luck and smooth sailing! Jeff