So I have a question: The (what looks like) fiberglass/heat shield fabric wrap that's on the exhaust pipe - is that something most folks have applied? My surveyor mentioned something about needing to do that (none of my exhaust plumbing is shielded in that way on my 2009 3YM30), and he mentioned in the survey that I should apply it. I wasn't really sure what he meant (first boat with an inboard), but seeing this I'm beginning to understand. Would appreciate being educated on the why and how of this.