That's it Jim many thanks. Just as well start another, I had taken enough of his thread off topic.
Any way to link it there as it is relevant to the conversation?
The next one should and will be magnetic as the thread in aluminum is wearing already.
Maybe try a plastic with a magnet and steel liner or similar.
This was all done on my wood turning lathe using the carbide tool for metal, and it does get tough on the steel.