Needed something to fit on my 2in stud and the model was way too wide. Shortened, and moved the screw holes. Holds my 1kg spools no problem. don't have anything above that to test it on. Helps if you can see the studs like in my unfinished basement. If you were using drywall anchors, you may have better luck with the original design.
Added .ipt (inventor) file if you want to make any modifications.
The modified file (not pictured) is a rounded top instead of a flat one.
Printed in PETG at 30% infill 0.4mm nozzle 0.2 layer height. supports will be needed, for ease, I printed with tree supports touching the buildplate in cura.
The author remixed this model.
Made it a bit smaller to fit on a 50mm/2" stud. used 2 screw holes instead of 4. Added a slight countersink to the screw holes.