Thanks G, I understood some of your explanation, and will look up the rest. It basically fits with the analogy of the dart with nose/tail weight from B2N2, which works as an aid to visualisation, although obviously there is way more to it.
By coincidence it's a CFM Shadow pilot who most recently asssured me that his aircraft wouldn't spin, no matter what he did to it, and he couldn't get it to drop a wing either. I'd be happy to own one actually; apart from the 2 stroke engine I think it would suit me and my budget very well. The other aircraft I was told about with a reputation as being impossible to spin is the Cri-Cri, although I read an account of a test flight somewhere a while ago where the pilot inferred that he had acheived some kind of spin in it, but didn't comment further. I can't find the article now, unfortunately.