Differential
thingiverse
Get a printout and savor the moment. A little assembly required, though. Check out this YouTube video for more info - https://www.youtube.com/watch?v=3XgHze6lc8M
Download Model from thingiverse
With this file you will be able to print Differential with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Differential.