Pocket Great Ball Contraption
Original idea for this MOC came from fellow Bay Area LEGO User Group member Sherry Caywood who was studying stepper mechanisms and wanted to duplicate a paper version she found online.
Already have some of the parts? Use the Build this MOC page to only show the parts you are missing.
Waiting for Inventory to load
Help Guide - BI File Types
This MOC also has a 3D digital file available (eg LDD, MPD, etc): 3D Model