A resource for the model boat builder and rc power boat model builder. free plans to build rc power boats with information on racing. Power boat throttle lever base size 8mm wide x 8mm high. comes in kit form and is unpainted.(pack of 1) find out more. £2.76 / us$3.11. Aspen’s patented power proa hull offers the softest ride, best fuel economy and accommodations of its class. built in the usa – burlington, wa..