Mr. Punter, of Australia, made his own molds and die cast the parts for this air-cooled aircraft engine. Die casting differs from sand casting in that the molds are made of steel and the molten metal is injected into the molds under high pressure. He built only four of these engines between 1976 and 1980, and each took approximately 150 hours to complete—this does not include the dies for casting. The first engine took over 400 hours from design to a working engine. It has a 7/8-inch bore, 11/16-inch stroke, weighs about 14 ounces and burns methanol on glow ignition.