Updated Nov 3rd: Made the connection between the struts and the base thicker and wider. Changed the orientation of the STL to print on its back.
Updated Sept. 8th: Moved threaded inserts to the back side of the stand for better strength. Use two M3 15mm length screws to mount the spool holder.
Updated holes to use M3 4.6mm OD x 5.7mm length threaded inserts. Provides for a stronger mount of the spool holder to the stand. Added material to the front of the feet (does not extend the feet) to be able to add adhesive felt furniture pads under the feet.
I recommend printing this with 3 perimeters and 35-40% infill. You don't want the weight of a full spool of filament to over power the stand. The first ones I printed snapped in half (I didn't print it on its back and did not use enough infill). Now very strong.
The author remixed this model.