Moebius Gears Half Size

This is Blake Courter's Moebius Gears at half size.

You can see the initial thinking and development behind the Moebius Gears at Blake's blog page here:
https://blog.grabcad.com/blog/2014/10/14/mobius-gears/

This remix is simply a half sized version of his Moebius gears v4.
https://grabcad.com/library/mobius-v4-m6-with-bearings-1

Additional hardware needed to complete the build are eleven M3x30 screws with a countersunk head, and twenty-two 3x6x2mm ball bearings (Traxxas 6642 or equivalent). The bearings are by far the most expensive part of the build, and I was able to get them for as little as 78 cents each, which for 22 of them works out to $17.16.

The ball bearings press-fit into the ends of the gears. No nuts are required for this version as I have chosen the arms that you screw into. No tapping of the threads is required for this version, just screw the M3 screws into the plastic. I was not able to use the nut version of the arm for this half sized version becaus