A fenwick williams catboat carefully reinterpreted in cedar strip. includes cleaner structure, optimised foils and a tabernacle rig that allows raising of the. Model boats; plans – boatbuilding; plans – projects; small boats annual; tools; 12′ 6" catboat tom cat. item #: 400-143. availability: in stock. qty. additional. Power catamaran plans and kits, catamaran plans , bruce roberts web site offers catamaran boat plans and catamaran boat kits for fiberglasss and aluminum boat designs.