Ball inside ball

This is a simple 3D printed rotating ball-in-ball fidget design.
It is designed for smooth rotation and satisfying hand movement.
It needs supports to print
Feel free to remix and improve it!
(This is my first model, so there could be some mistakes. Feel free to tell me my mistakes!)

-Printed on PLA
-0.2 mm layer height
-0.5mm clearance between parts