The client, an owner of a high end picture frame shop, needed help designing a series of  rotating triangular towers to show off samples of his frame material.  The towers rotate slowly and are mounted to a series of large spur gears and smaller spur gears to allow all towers to rotate in the same direction.  I created a active 3d model of the display to allow him to see the design actually rotate   prior to construction to be sure it met his desires.

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