The spindle with removable whorl got shown to a Portuguese historian. She will be starting extensive travels in the near future. We played with the spindle for a while (we were at the LYS) and decided it (with a distaff) was as fast as any of the traveling wheels in the store. So, I gave it to her. I believe in giving nice gifts to the people that write history.
Thus, I needed a new spindle. Mark II:
It is 15 grams lighter than the Mark I.
It did not work! The weight or dynamics were wrong and it wobbled too much. Put that puppy on a diet.
Thinned, with a deeper groove and a heavier nut, it works. It wants a distaff. And, it wants to spin much finer than I was trying to spin the blue Romney above. Details matter.