My pleasure Keith. When it comes to leaks, "I've been there" many times and I've tried different types of caulking.
Main Sail has a pretty informative thread on bedding hardware that I've learned quite a bit from.
http://forums.macgregor.sailboatowners.com/showthread.php?t=117172
I've adopted some of the practices off this thread and it's worth checking out.
I've found that through the years some of the leaks on my boat were created by my own ignorance in using deck cleaners that ate out the caulking under the gunwale moldings. I've mentioned this many times over the years but I feel that it's always worth mentioning again.
I saw it one of my many boating books under "Hints and Tips." It read, "you can clean your hull with ordinary household cleanser that you can buy in any grocery store." I think they called it "Zud Cleanser" and Hey it worked like a champ, except the Oxalic Acid that is in this cleaner ate out the caulking around my gunwale moldings and I had leaks up the ying yang coming into my cabin.
So, in the words of my old fifth grade teacher, "A word to the wise is sufficient."