EDIT: I would find at times the original version would tip. I've has no spool issues since printing this one.
I extended the base to be further out than the end of the spool holder. Used my slab model and added another flipped 180.
-Sorry for anyone I ruined a print with a tip over.
The author remixed this model.
Remix by @MiSchi - https://www.printables.com/model/131300-spool-holder.
I created the slab base plate. Cut the original model and added slab as part.