Wow I am impressed with the knowledge of boats on this web page. Yes, I did not describe the boat or my intentions. My boat is a 2006 Cape Cruiser Venture 23. Because of a lot of concern I had read on this web site, I feel it is necessary to make an inspection hole in the rear deck and also in the v- birth area to assure there is no standing water or balsa core issues. I had been told the boat was stored in a airplane hanger when not in use, by the previous owner. I now keep it under roof when not in use. Awhile expanding the out building it did sit outside this last summer for 3 months. When winterizing the boat, I noticed tubing going into the void under the cockpit deck by the fuel tanks, and behind the frig. on the starboard side. I used a syringe to syphon out about a gallon of water mostly in the cabin void. the water was clean which tells me it is probably from sitting out this summer. Appears to be coming in from one of the railing posts. Is the void under the deck continuous from bow to stern or is it blocked at the rear cabin wall. And where would be the best location for inspection ports?