Continue those diagonal wraps as the Nostepinne turns to let the next wrap rest above the previous one.
Voila! The ball is done. All the yarn is wrapped. There is the 'center pull ball'. However, the 'pullable' side is facing the handle, and I want it to face off the 'end' of the Nostepinne. So, I slip it off the end and turn the ball around, then slide it back onto the point of the Nostepinne.
Here it is, turned around so that the 'pullable' side is facing the end of the Nostie, ready for that side to get on the needles or hook.
Here is the center pull ball, parked, ready to use!