http://www.youtube.com/watch?v=AZygg1Ci5Mk This balancing toy’s simple shape allows a belt to suspend from the tip of a finger seemingly in an impossible position.  I believe there is room for the shape to change, so I recommend drawing it roughly based upon the measurement I provided, and sanding until it can balance a belt. DIY Drum Sander for Pillar Drill / Drill Press :  http://youtu.be/fLDNL8w940I