Wind vane.

Parts of a wind vane that suits 16mm tubes.
For my build I had a 16mm stick and a pair of 16mm metal tubes.
I uses a nail to hold the propeller in place.
I change the propeller because the first one (on the print picture) was a bit small and also difficult to have a good result.
I only print the 4 propeller, but I am confident the 5X will work fine.

Made with Tinkercad : change it as you need : https://www.tinkercad.com/things/ksYVxDAa8bV-weather-vane-16mm-tube