I looked at a boat today and noticed cracking in the overhead around the support pole for the mast. What is the best way to fix this and is it cost effective to fix it if the boat was the right price? Somebody told me they jacked up the overhead and slipped out the pole, then mixed some pour-rock in a plastic 20 oz. bottle, inserted it in the hole through the deck to the bilge, then inserted the pole in and held it up until it hardened. The factory had originally placed a piece of teak about 1 1/2" thick x 2 1/2" x 4" long under the pole. The teak piece that came out was compressed to within 1/2" of the total thickness causing the mast to compress onto the coach roof. Is this a safe fix?