Now that many have helped me realize what I need to do to fix a loose foam block and double check another pice I need to pick ur brains as to what size port inspection port I should install and is it best to install it on the deck or fore and aft in the cockpit. Defender Marine has a 6 inch and 10 inch at really good prices. What I am interested in is the best hole size for correcting problems that may occur. By the way the boat which I thought was an early 80"s is a twin stripe with no HIN plate..which probably puts date of manufacture in the late 60's. The original finish is in very very good condition so I doubt if it was sailed much although the person I bought it from did sail it. Being that old things dry out and need attention.