About this 3D model

This Marblevator is indeed armed, as it utilizes an arm mechanism to lift marbles from the end of the track and position them at the beginning of the track, but it's not dangerous (well, unless a finger gets in the way)! The tracks are interchangeable, I'm working on new ones. Video of prototype is here: https://www.youtube.com/watch?v=PAVz1Sx7UTg. Designed using Sketchup Make 2015, and printed in PLA on a Makerbot Replicator 2 using Makerware 2.3.3.42 "Standard" Settings (.2mm layer height, 2 shells, 10% infill).