Typical nylon fender washers are less than 2″ in diameter. I wanted larger washers, especially for the CB, to pick up some of the side loading this foil would experience. I read somewhere of others making their own fender washers using a poly cutting board.Walmart offered this cutting board for $2.45. I especially liked this shape, as the board thins down after the outside edge, making it a narrow 1/8″ thick. This narrow washer will not force me to expand the width of the CB trunk, allowing for a fairly narrow slot in the bottom of the boat.The small washers will be for the rudder, the larger washers will be for the CB.Using my band saw, I cut out the circles. The diameters measure: 2 1/4″ for the smaller washers, 4 1/2″ for the larger washers.Shinto rasp smooths the edges.Wood rasp finishes the job. Not bad for $2.45 and I have some left over material to make a few spares.