Excellent tip Parallex, JB Kwik is not a product I know of, but have looked it up on Amazon, so I think I may order some of that.
I do have a slight problem still, that when locking the switch, I often catch the top brass button, and it gets loose. So far its come apart twice...lol
Yes, I know I have not got it tightened sufficiently, and hopefully a friend, who has a GGTS is visiting this week, and will tighten the whole thing up for me.
I have the magnets now, and I love the fact that the top one, on escaping, somersaults and hangs onto the other two....
I also have a spare switch now as Krom sent me a spring too, and that's the one I need help to unscrew.