Like the original model, just make a ring on the inside to make it spin.
Print setting :
0.2 layer height
3/4 perimeters
15% or more infill if u want it solid
gyroid infill
random z-seam
Print in place.
2 versions available (one with small and one with bigger ring)
The tolerance of the ring is tight fit so be sure to have a good calibrate extrusion.
If it stuck just gently move the ring up and down to make it loose.
(If u enjoy my design u can like, follow and tip me)
The author remixed this model.
Change the design to make it spin like a fidget toy