Jinx wrote:
> > A snowy hill usually works.
>
> Ah-ha, the obvious. Specify that proper operation is not
> guaranteed away from the Cresta Run or Aspen

   Does anybody remember IBM-360 hard disk drives with
the great linear drives? Cylinder magnet and a sled inside.
   Few of them lined up will look awfully (though not as awfully
as new NASA's underground launcher project)

Mike.

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