According to my calculations, Starboard has a density of about 60 lbs per cubic foot. This is almost twice as dense as wood, and almost but not quite as dense as water, so theoretically it would come close to neutral boyancy. A small amount of lead, or perhaps a strip of steel screwed to the leading edge to fend off inevitable collisions with terra firma, should keep it down. As to a CB application, I'd be concerned about flex. If the cost isn't prohibitive, the surest way to find out is to build one and try it. The results may surprise us all. Steve Tyree, P-15 #2098 "Amy Ann" In a message dated 2/21/2004 11:02:37 AM Central Standard Time, chonshell@ia4u.net writes: I would be very interested in pursuing the Starboard option . . . Would anyone out there have the mathematical savvy to plug the M17's centerboard dimensions into a formula calculating density and buoyancy of the particular thickness and size of a chunk of Starboard? I have a Liberal Arts degree, and am a math moron . .