Filament spool wall-mount truss bracket. Hidden Screws!

Brackets to wall-mount a dowel (19mm) to hold multiple spools of filament. I've currently got over 5kg of material up. I'll let you know if it falls on my printer! Hidden screws! How exciting.

Edit: I took off a few kg. Now I have ~3.5 on there. Also, make sure to print this on it's side. Not sure about you by if I tried to bridge those trusses, it would be a disaster. Plus, the surface shown facing the buildplate in the CAD image is not flat.