Sticking a Whorl
Removable Whorls are usually circular and have a hole in the middle. This hole can match your spindle stick taper perfectly or not.
1. Tapered Whorl Holes are superior when their taper matches the spindle stick taper for perfect fit
This match between inside and outside tapers yields maximum whorl stability - the spindle shaft and whorl hole are touching all the way down the hole. The whorl is harder to slide off the spindle shaft in use. Not perfect, though. It is always helpful to wrap a tiny hair rubber band to the bottom of the whorl to prevent sudden in-spin flight to unknown spots on the floor or, worse, in the grass.
This match between inside and outside tapers yields maximum whorl stability - the spindle shaft and whorl hole are touching all the way down the hole. The whorl is harder to slide off the spindle shaft in use. Not perfect, though. It is always helpful to wrap a tiny hair rubber band to the bottom of the whorl to prevent sudden in-spin flight to unknown spots on the floor or, worse, in the grass.