My wife bought some new thread spools which don't fit on the holders I printed for the rest of her spools, so I made this design in Fusion 360 to hold four spools with a wider diameter.
I was looking for an alternative to my wooden spoolrack with the same spools you show here, so it is next on my printlist. Have about 80 spools of the embroidery spools. If I'm finished I'll post the results.