Need some advice, 1988 Cadorette 166 has a crack on the transom right side of the stern drive about 30" long diaganol. It appears water got in through a clamp hole froze during winter storage and caused the fiberglass to separate from the wood behind and cracked it right through. No damage to the wood, just the exterior. Need some advice as to the best way to repair this myself, a local body shop quoted me $1000. Thanks