>> >> actually, i think the big thing is that they be "rotationally"
>> >> symmetric, not "reflectively" symmetric.  like a fan blade...not like
>> >> a bird.
>> 
>> I would imagine getting a rectangle to be rotationally symmetric would be
>> pretty trivial.. think 2-blade propeller.
>
>I'm thinking 2-blade propeller inside my CD-ROM drive and not getting
>very excited at all :-)

no worrys.  cd -> contains damage.  :)

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