Thanks for your comments guys. I'm sure I'm trying to over analyse it. Need to keep it simple and see what the prototype produces.

: I went through the same thought process some time a go. After drawing free
: body diagrams of lateral forces I concluded that the center of lateral
: resistance of the water should be directly under the center of lateral
: resistance of crosswinds i.e. the centroid of the lateral area below the
: waterline should be directly under the centroid of the lateral area above
: the waterline. This assumes the lateral forces of the water and air over a
: three dimensional object will center on the area centroids creating equal
: and opposite moments about the CG (or center of buoyancy) and ignores any
: affect of forward motion. If the two foces line up it doesn't matter where
: the COB is located. My guess is it will be close enough that moving the
: seat forward or back an inch will trim the boat to correct for the error.
: This only looks at crossiwnds, quartering waves is a whole different
: topic. I guess that is why they build proto types. You just can't
: calculate everything and change are needed to correct for assumptions and
: oversights.

: For more rambling click on my "Old Post" below.