"Also - the Prosail 40s were not one-design in the sense you say. At one point there was trimaran in the mix."

He did not say "Prosail 40's"; he just said "Prosail," so I think he was referring to the Hobie 21's, which were part of the Prosail series.

Obviously, the 40's were not one-design, because that division included both catamarans and trimarans. The Hobie 21's were one-design.