About this 3D model

Only had 4.5mm bb pellets lying around and just had to try and see if this will work :-) Spins reasonably smooth. Not holding any time records though :-) You'll need 15 of the 4.5mm bb pellets. Slide the pellets through the small hole, while holding the center part in position. Plug the hole and trim the peg. Happy spinning. FYI: I made the gaps slightly over sized, intentionally :-) , in order for the bb to run more freely.