Hi dad!
It is not the Hobie 21 "sports" cruiser I'm thinking of.
Come to think of it, I think only the hulls were carbon, the rig is alloy I think. I googled the hobie 21 SE and it is not the boat I was thinking of as the H 21 formula has a scaled down cross beam between its bows to maintain stiffness (N6.0 style). Check out the Texel ratings, the Hobie 21 formula has the same rating as the M20! There has to be someone who has heard of this beast!?