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Greg Zumwalt
 gzumwalt  Oklahoma, USA
Formally a video game and avionics designer and now retired, it's just me designing and building things.
Formally a video game and avionics designer and now retired, it's just me designing and building things.
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PLA Spring Motor Demonstrator by gzumwalt 4 days ago
A Ripple Effect, Hand Cranked Edition by gzumwalt Jun 14, 2014
Perseverance by gzumwalt Jun 1, 2014
Geometry Wheel by gzumwalt May 16, 2014
Perpetual Motion, da Vinci Style by gzumwalt May 14, 2014
A Ripple Effect by gzumwalt May 9, 2014
Frustration Participation (Hand Cranked Version of Frustration) by gzumwalt May 4, 2014
Frustration by gzumwalt May 3, 2014
Marblevator "Mini", Clockwise Hand Cranked Base by gzumwalt Apr 29, 2014
Marblevator "Mini", Counterclockwise Hand Cranked Base by gzumwalt Apr 25, 2014
Marblevator "Mini", Zigzag Edition Track by gzumwalt Apr 24, 2014
Disco Dan the Dancing Man by gzumwalt Apr 20, 2014
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