Lightweight Spool Rack / Holder

I created a lightweight spool holder for my filament spools, I wanted to make it as light as possible to save filament, it is only about 270 grams of filament to hold 6 spools on 2 levels. I have only tried two levels because for the amount of filaments i have it is plenty, it could probably hold more levels but honestly I haven't tried. If you do, let me know how it goes! I also added 5mm holes for fixing it to the wall or a panel to add stability.