Fixable spool hub for quick filament change

I designed it after I tried multiple designs for over a year and each one pissed me off.

This i a hub which you mount on a spool using three M5 screws. It has 608 on both sides, you just throw it on 8mm rod and you're golden.

Useful if you have few filaments that you switch around.

I made one on the photo with 6mm torx screw cause had no M5 screws.