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Gordon is building a new fixed-post mirror-grinding machine, and had to find the center of a big round turntable top he is building. Using little more than a "tricky" piece of paper, Gordon shares with you how to pinpoint the center of any circle. Amazingly, you don't need to measure anything! Use Gordon's trick for woodworking projects, scrapbooking, crafts, or any place you need to find the exact center of a circle.