Filament spool holder storage

A filament spool storage hanger, this is designed for a spool of 20cm diameter to hang on the wall. Due to the open design it is also possible to put away in a plastic bag. The back is slightly angled so that the spool does not slip off the front.
Holes are M3 size.
It was based on thickness of a spool 77mm (the yellow one).

I printed in PETG, i think PLA is strong enough but i didn't test it yet.
It can be printed without support.