Arcade Spinner

These are 3D printable parts that can be used to make [this really nice arcade spinner](http://www.digitpress.com/library/techdocs/how_to_make_a_spinner.pdf) using mostly 3D printed parts. I replaced the main 1/4"-20 screw with a 5/16"-18 threaded rod so that I could use leftover Prusa Mendel parts to make the spinner. This design uses a stack of 5/16" fender washers, a ~4" length of 5/16"-18 threaded rod, six 5/16"-18 nuts, two 5/16" lock washers, 4 5/16" standard washers, and one 608ZZ skate