I have a 1978 CHB tri-cabin. The aft head looks like it was assembled first and then the whole thing installed in the boat. My problem is that the cold water faucet leaks water onto the counter top. There doesn't seem to be water leaking under the counter onto the floor or into the bilge. There is no access to the faucet. I'm looking for ideas. I'm thinking of cutting an inspection hole into the panel right in front of the faucets, but I'd love it if someone had a better idea. Thanks. Jeff