This was remixed from stevemedwin's Alien Ball Bearing I split the file for a two color printing.
UPDATE 4/20/2019: Fixed the non-manifold vertices.
This is my 183rd design on Thingiverse so be sure to check them all out and follow me here at Polymathic Designs to be notified about all my new designs.
Post your makes of this, I would love to see them.
Feel free to ask any questions about printing or to make requests.
ONLY WORKS WITH DUAL-EXTRUSION PRINTERS go to the original model for the single color version.
Supports need to be removed after printing the picture above shows before and after removing the supports I still need to remove some of the smaller pieces.