3D print design review - Spring mechanism 

Review of the design of gzumwalt, Greg Zumwalt called "PLA Spring Motor Demonstrator" wich we have actually printed it in ABS to see if we could make it work.
Despite the fact of breakable parts, it makes a wonderful design to apply on other objects and learning how to 3D print
Medium difficulty, in fact, it requires a bit of cleaning and some assembling care.
Music from RamRom and Capashen from their Jamendo profiles.