@Kwaaked thank you for your explanation.
My spool is actually sat on a wooden pin so cannot roll or wobble over.
The small eye now on the machine spool pin is small enough so that if I have to use stack wound thread the spool will still sit over the top of the spool pin thereby eliminating searching for a safety pin.
Most of my thread reels are cross wound.
I think I have sussed the thread distribution system now so happy with that.
Pete