3 resin until the required thickness was achieved. Hulls could be made as required from the mould. Butt constructed his first plug and made his first mould in 1955. The boats made from hulls cast from this mould being unsatisfactory, he made a new mould in about 1959. From this he started making hulls which he sold under the name of "Butt-Cat". The design was modified in 1964 and again in 1974 and 1978. ter year he constructed a new plug, from which In the lat¬ he made two moulds, one of which he called his No. 1 mould. About 75% of the Butt-Cat hulls now produced are made from the No, 1 mould. Over the years the development of the Butt-Cat hull has taken a great deal of time, trouble and money......