Hand spun yarn and yarn winder

In this post there is some hand spun yarn
Here is the same yarn plied. With high speed yarn winder it turns out that the ball core (necessary for goat down yarn not only to the ball from collapsing, but to set the yarn also) should be different in comparison to smaller yarn winder (where paper towl roll core works if some elastic is added to the ball winder bobbin so the core does not slip when the yarn is wound)

the ball will be lover on the core. the core is constructed of 2 pieces of paper towel core cut in the middle (length wise) and taped a little at the top so it does not fall off.
When the ball is done I pulled the cut pieces back together and have moved the ball gently and carefully about  1.5cm from the core bottom.

this much. the core is positioned like it was wound.
Now, stabilizing the leader:

and the core of the ball close up

when all set and done, I moved the sides of the core wider so the ball is tighter from the inside and taped them carefully so I do not disturb the ball itself.
Ito the wet baby blanket it goes to set (I do not use wet hot set in our dry climate, my grandma did not use the hot set for goat down yarn either, we just used longer set time).
Traditionally a different kind of round bobbin is used to wind the yarn (basically a piece of carton, a circle and one will wind the yarn on it by hand, white or like above non colored paper or carton, ink is not your friend in the wet yarn set situation).
I did similar set with the ball winder, seems to work fine. however I do like nostepine (well... I just use that paper towel roll as is) type of winding somewhat better. This particular yarn winder does make not so tight ball on the edges, less tight that I like personaly.

It is about 1/2 of the spun yarn plied.