On Tue, 11 Dec 2007 15:36:08 -0500, Leon Fisk
wrote:

Somebody made a sling-shot, weight and string rig too.
Nowadays someone would probably freak out and call the
police if they saw you with a sling-shot...

Here are three different patents illustrating the idea:

http://www.google.com/patents?vid=4587943

http://www.google.com/patents?vid=6209531

http://www.google.com/patents?vid=2808043

Don't know if one was ever sold, but it wouldn't be too hard
to make one for yourself.

RC would be more fun

--
Leon Fisk
Grand Rapids MI/Zone 5b
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