No supports needed when printed on side.
Material = eSun PLA+
No recommendations for infil
The author remixed this model.
I wanted a horizontal spool holder like the one done by Folxlore, but I wanted a stronger spindle. With the modifications, I was able push a hollow brass tube (OD = 8mm) through the holder. The modifications also allowed me to print the model on its side without supports
2 modifications: