Sorry about going off topic there Dave, I just couldn't help myself.
Getting back to the magnet things.
I would never have thought that with graphite, maybe it is because of that type of graphite being in layers, I suppose it must have some sort of polarity of it's own.
Ever since these neodoodah magnets have come onto the mass market scene, modellers are really filling up their boots with new ways of putting them to use.
I'm pretty sure some amazing engines will become known in the not too distant future. When guys get their heads around the properities of them, and how they can be used to produce motion, and most probably not just rotary.
Bogs