fidget/fiddle spinner hubcaps

I've printed a few spinners for my family - I've not bothered to design my own since there are plenty of good designs out there (I've been printing lovewaffle's cog triple spinner) but I wasn't happy about most of the designs for the hub caps, which are either hard to fit, or can lead to friction against the bearing, or both, so I designed these:

- pedestal on the shaft so the only contact with the bearing is with the inner rotating part
-shafts are very slightly tapered, so go in easily bu