You can find lots of people to talk to at this location:
http://www.carolinasailingclub.org/about/contacts.htm
Good people to talk to would be Joleen Rasmussen or J.P. Ayers.

The Isotope is raced both single-handed and double-handed. Some really neat features, including built-in storage/coolers in the hulls and was the first (and is still the only) cat to come stock with a righting pole system.

The designer is also the builder, International Fiberglass Corporation. http://www.intl-fiberglass.com/boats.html

It has a strong and enthusiastic, though small, class association centered in North Carolina.