Hi George, To give you a better feel for the sailing conditions and what I found when I had the centerboard trunk leak............ This was the first major outing with our "new" M15 after I had bought it. (this was the first time I put it in the water) We had been crossing Lake Champlain - about 5 to 6 NM in each direction, (Essex, NY over to the Vermont side and back) plus just enjoying broad reaches back and forth on a most pleasant day. No waves; nothing over the bow; no lee rail buried; just very pleasant sailing in about 10 kts of wind. We did bounce through the occasional powerboat wake which resulted in wet feet as water came up the CB pennant slot, but absolutely no water on deck. When we got home to the marina, I went into the storage locker either looking for something or putting something away and found it had about 6 inches of water..............!? Looked into the other locker and found the same. Checked under the V berth and found more water. That was when the question arose: ......how did it get in there? ......where did it come from? ......and the search started. That was when we careened the boat and saw water pouring into the storage area on the port side high up at the aft end of the cabin liner. After I finished the repair, I drilled a 1/4" hole P/S in the cabin sole, on either side of the CB trunk so that I could put in the small tube from my little hand held PAR pump to remove water that remained between the hull and the cabin liner; ........and as a check that the boat was really dry, and I had fixed the leak. Later what I discovered is that boat wakes can cause spurting in the CB pennant slot; and even gentle waves are enough to cause the pennant slot to burble and spit back at you: i.e., water is always all the way to the top in the back corner of the slot as you sail, - and that was exactly the location of the gap that caused the leak. So leak quantity became a function of sailing time and speed: higher speed = more water in boat. I stopped the spitting and burbling by making a teak block that fits over the CB pennant, and that sits in the CB pennant hole. There is clearance enough so that rain water in the cockpit (at the marina) can drain out, but the plug is very effective at stopping the spurting and the wet feet that you can get if it is not controlled. Connie