I was just going to ask this question:
I understand that one source is the ball of yarn, but what is making it twist? I don't have a standing spinning wheel. If I use the charkha I have to use my prehensile tail to turn it.
What am I missing?!

From this video, and from the lesson that Elizabeth gave me, one can use a drop spindle. But, I feel like I need a prehensile tail to turn the spindle while I control the yarn with both hands. What was Eileen doing at the workshop? Did she use the charkha and just stop plying so she could turn it?

It's taken me this long to even figure out how to ask this question! Please bear with me. I've asked this question of Eileen as well so we'll see what she says.

And, to whichever brilliant dancer in Indiana (was it you, Angie?) that told me about plying two yarns from a center pull ball...you have changed my life! Now the brain space that I was giving to frustration over the matter can be used for more altruistic purposes.