On a 24-by-48-inch piece of ½-inch furniture-grade plywood, mark a spot 8⅞ inches from the top and centered 12 inches from each side. Plant your compass point there, and draw a circle with a 3-inch radius. Drill a hole anywhere inside the circle for the jigsaw blade, and then use the jigsaw to cut out the circle. Stack the two sheets of plywood together, and use the cutout to trace the circle for the second sheet. Drill a hole, and then cut out the circle in that piece.
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