DC>> Hmmm, that's probably how they do it...  After all,
 DC>> the poles are only very convenient reference points.

 GL> Well... the poles are a bit more then convenient ref
 GL> points. They are the axis right now. Still, they are
 GL> subject to changing location.

which poles? the physical ones or the magnetics ones? i'm aware that the
magnetic ones do move and float around...

)\/(ark