Very easy print. Needs eight "tops" for the four bearings. I don't have the right bearings but It looks like 608ZZ are the right ones. I've put some on order and will post pictures on Monday when they come. The bearings (608ZZ) came today. The caps did not fit, they were too tight. The bearings did fit but very tightly into the spinner itself. I had to use a hammer to get them settled but nothing broke doing that ... I reprinted the caps at 96% and they fit snugly but pressed in with only finger effort. Great fun to just sit and twirl it. I approve ...