I created this extruder spinner for my Monoprice Select Mini v2 inspired by a similar design. Rather than remix the design I saw, I came up with my own as an excuse to learn Tinkercad and to make the parts easier to print.
You don't need to use supports to print either piece, though I'd suggest using wide brims for the base piece to keep it from toppling over.
The dish piece is designed to be printed facing down.
The post on the base has a faceted interior surface to help it fit snuggly over a variety of extruder posts.
To print the base:
Print standing up with a wide brim (0mm offset, with 3-4mm of brim)
To print dish:
Print facing down. No brim necessary.