Oooh, I found a YouTube video of this in  use:

http://www.youtube.com/watch?v=RlF6OTEDaXQ

Cheers,
J~

John M. Johnston
There is a fine line between hobby and mental  illness. Dave Barry

In a message dated 1/23/2010 5:12:09 A.M. Central  Standard Time, 
peter@p... writes:
Nuno Souto asks...
I'm  having difficulty visualizing how this thing works.
Anyone has a link to a  video of it in operation?
Thanks for the great post,  Peter!
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