Wooden ring sanding support for rotary tool

Hi everyone!
This is my design for a support to make it easier to sand the outside surface of your DIY wooden rings.
The only non printed part you will need is an M3 screw (suggested length around 30 mm).
The numbers in the files name "base....", "nut..." refers to the measure of the ring to be sanded following this measuring system: https://www.juwelo.it/misure-anelli/
Enjoy!
EnginEli