Hi Malcolm, My comments on CS hull forms are from other CS hull type owners I have contact with who have a normal weight for a boat their size. The Red Diamond is around half the weight of cruising boats her size so I stand corrected, make anything half weight and of course it will fly. The same 450 horsepower in your New Yorker is quoted to deliver 24 knots, that's around the norm for the most HP that will fit in the hull for boats that length. Our new hull is expected to be around half a knot slower with that HP but plenty of walk-around engine space and enormous volume and load carry capacity for long range fuel capacity makes the small trade off worth it. The cost of 2 percent in efficiency can be lost in many other ways. Other areas of life and boating can leave a larger carbon footprint than the 2 percent of our fuel bill, how often one scrubs the hull will have more effect to the fuel bill. I know Craig Loomes use to use the CS hull form and to get wider has since moved away from it to a form more like Crowther's of Australia, Apollonio of US, Jutson of Canada, Roger Hill of NZ, Given of NZ and so on. I think you and Kelsal and the Manta guys are the last ones using it. It probably is one of the most efficient around and the protection to props is a nice feature but those 2 features aren't everything in the big picture so we won't use it again. We are seeking better fuel capacity and better rough water ride so will have to trade a little economy. Talking with other globe trotting CS hull Powercat owners and delivery captains they also rate this highly and are happy to trade half a knot for them. We are up to monohull number 6 from our Asian builder who has built 500 in the past 30 years and it staggers me how people still buy a monohull that needs twice the power of a Cat. But they have their reasons too. Most will never burn enough fuel to warrant the extra cost, development effort and loss in re-sale for a one-off to buy a Powercat. Under 60ft production cats fare better in re-sale I've noticed but the one-offs are hard to sell, especially in the larger sizes. Rod Gibbons, you are keeping quiet over there, lets hear your thoughts on re-sale from a brokers point of view! Best Regards, John Winter www.adventurebaypowercats.com