Welcome, Debra, to the ranks of happy Montgomery sailors ! Steve, look into the three storage wells inside the cabin for signs of water (that old ring around the bathtub look) and around both windows. If water got in any of the compartments it could move under the interior molded shell and would settle in the vicinity of the potty location. And, yes, I believe water could seep through cracks in the gel coating and fiberglass interior liner and get trapped under the potty location. That might be the best of the possible reasons for water to be collecting there. When the outside cockpit gets water in it, it drains around the line used to raise and lower the center board. It isn't unusual for wave action to cause a back flow of some water up into the cockpit. You've probably read the many solutions found for that. However, thanks to an incomplete glassing job on the trunk, I took water in the cabin as well as the cockpit until I found the flaw and patched the thin fiberglass housing through which the center board line and the cockpit drain pass. There is only about a 3/4 inch drain hole on the floor of the cockpit but the housing below the deck opens into a square or rectangular shape and is totally hollow. The water normally fills the (long rectangular) center board keel cavity and when there is sufficient pressure it will push upward, fill the trunk and squirt up out of the drain. If that trunk isn't sealed, water will flow out into the sump and eventually flood the floor. Give the hull a very close examination for holes, cuts or deep nicks. Hopefully, you will not find any spongy areas but test for them anyway around any possible holes. If the water isn't coming through the hull you are in luck - all you need do then is find where water is leaking down into your cabin. (down is better than up) I've never tried filling a cabin with water to find a leak - and don't think I ever will. By the way, when you take her sailing, don't let the center board down (or pull it up) too enthusiastically. The pivot point for that very heavy centerboard is tough but it is vulnerable. I expect your 1981 board has multiple cracks and fractures in that stress area by now. Mine came crashing out a few years ago and I had a ball getting it fixed. Stan Carol II, #177