I design this headset Holder to fit IKEA Lack Shelf.

On top you will see a recess, where you can place double side tape or glue any anti slip material.

On screw i did change filament after @ 1.2 for 4 layers then change back again to the original color.

Shelf i'm using: HERE

Printed @ 0.2 with 15% Gyroid - 3 Perimeters 

Will need supports

Happy Printing.