Boat plans bruce roberts official web site offers custom boat plans and boat kits for steel boats or aluminum boat designs, cut to size boat kits, part built boats or complete boats. bruce roberts yacht designs offer boat building project management arrangements for boats built overseas at affordable prices. sailboat and powerboat building plans and kits available for building steel boats. Trawlers . boat plans . kits. cutting files. please note – the designs where there is a yellow background are the designs which cutting files are available.. Design and supply of catamaran plans for sailing and power catamaran yachts is bloomfield innovation’s area of expertise. we have extensive experience in the development of composite and aluminium catamarans, including sailing and power catamaran yachts, commercial ferry catamarans and workboats..