Sure, you'll have to fill the existing mounting holes and prepare the new holes in such a way as to protect the core, but it's a fairly easy process (believe me, I'm not particularly handy, and even I can do it...). But it's a good idea to figure out how to deal with the deck regardless, because you'll find you need to master this routine if you have to change deck hardware or do repairs anyway. Just invest a few bucks in west system materials and go for it. Don't even work on the boat--you can practice on something else. Judy Blumhorst has some good tips at: http://blumhorst.com/potterpages/gennytracks/installinggennytracks.html What else do we have to do this winter?? t   Tom Smith and Jane Van Winkle M15--345  Chukar M17--064  Unnamed