Spinners with Balls: Volume V - 3/4" Balls

This is Volume V of Spinners With Balls -- these spinner designs use 3/4-inch balls/shot instead of the typical bearings in each arm. This seems to add nice weight while still enabling you to create a compact design with a long spin time.

A detailed video of how these spinners were designed in Fusion 360 as well as a quick test of spinners is available at: https://youtu.be/eWsjCDmPu_s

My other spinner designs are available at:
Volume 1: http://www.thingiverse.com/thing:2251166
Volume 2: http://www.thingiverse.com/thing:2257685
Volume 3: http://www.thingiverse.com/thing:2260326
Volume 4: http://www.thingiverse.com/thing:2269281
Double-Decker Spinners: http://www.thingiverse.com/thing:2261906
Volume 5: http://www.thingiverse.com/thing:2293420
Volume 6: https://www.thingiverse.com/thing:2291313