I have the boat under contract. Survey and sea trial is in two weeks. She has 3406E CATs. Any particular known issues to be aware of on the survey? Also, I cannot find any speed curve or fuel usage with these engines on this model. Owner estimates 25-26 kts at about 60gph at about 1950 rims or 80% load. Does this sound about right? Also, how do the fuel gauges work with two gauges and three tanks? The only obvious cosmetic flaw is a small one. The ceiling mirror in the day head is bleeding through major black lines. Is this common? Finally, do the Cats usually come with block heaters? Thanks from a new forum member.