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Would be great if you could extrude out the center bearing section into a 22mm diameter 608 bearing press fit...use you bearing on anyone else spinner design.
I've been trying to get your design in tinkercad to do this myself but for some reason won't load in?
Also want to remix this to take pennies to achieve a low cost spinner that works great. No bearing required and pennies add weight which are cheaper than nuts. And cheaper than the cost volume of filament at a 50% infill and triple wall for the weight.
Hopefully I'll figure it out.