Simple case for the GRID Brows with places for magnets to easy mount them on the rig.

Brows: https://grid-engineering.com/de-de/products/grid-brows

You will need 4 magnets with 12mm diameter and 3mm heigt.

The tolerances are very tight, make sure that your printer is well calibrated or scale it up a bit.
I also included the .step and .f3d if you want to make some changes.

Have fun. If you use it or remix it, please post it. That will help us all :)