I dont know much of anything about spinners but in reading the comments i wanted to ask if its at all possible to clean out the grease when they arrive at all to us to improve the spin time?
zrstultzJudgingmy the bearings that are shown in the picture, it will be.
It's a matter of taking off the side shields (with a paperclip or something like that),
using a solvent (like rubbing alcohol or acetone) or wd-40 or something like that to get the grease out,
and reattaching the side shields, if you are so inclined. Some people leave them off.