Hi, I am in the process of buying a 2002 Hunter 306, and just received the Marine survey report. The surveyor tells me the:"Engine exhaust elbow between the manifold and water injection point on the cast iron elbow- insulate with fiberglass cloth and wire retain to elbow-NFPA/ABYC recommendation"I informed the Hunter dealer of this and they told me no Hunter boats have this installed. Has anyone done this? Greg