Make sure you get the compatible bobbins!
"Important- to use the highest speed on this whorl, you need the high speed double drive bobbins, or it does not behave properly. I have made it work, but it does not take up evenly like it would with the proper bobbins. The middle speed still works fine as it's larger than my bobbin groove. Other than that, there is a slight misalignment on my whorl, so it doesn't attach perfectly straight. This doesn't seem to affect anything, but it's worth mentioning. I'm bummed that I have to buy new bobbins to use this whorl as intended, but I am still spinning much finer than I would with the standard speed whorl. Just be aware that additional parts are needed."
