Wall Mounted Spool Holder

I wanted to stop having my spool wobble on top of my Prusa i3 Mk3, so quickly designed this wall mounted spool holder - probably similar to other designs out there.

I printed it in Colorfabb HT, which is stiff enough to carry a 1kg spool without too much deflection.

Using two screws seems to be stable enough - I added 6 holes, but that was just in case.