I know I tend to talk and write in riddles at times and perhaps could express myself a lot clearer than I do.
What was actually in my mind was holding the chuck while withdrawing it to stop it revolving or coming adrift.
I am probably very guilty of this practice, I am sure I can picture myself doing it subconsciously.
Likewise the "been here before" was akin to another advise incident on a previous forum where a certain person kept promoting the use of cloth to polish on a spinning lathe.
The times I said to him you can say what you do but no way can you recommend that others do it, this is not only bad advice the person he was advising would have sued him when he had the inevitable accident.