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Hopefully this will be the "fastest hunk of junk" spinner in the galaxy! This is my first fidget spinner design, so I'm sure there will be tweaks! Ideally, I'd like to do a center of mass study to see if I need to relocate the bearing, to ensure it actually spins smoothly as I haven't actually made one yet! I based the design around the McMaster Carr 5972K910_BALL BEARING.