Re: Sling shot techniques?
Here are coupe of articles and videos:
Fly Casting with Jim Williams | Eat, Sleep, Fish
Variations on the Bow and Arrow Cast including a Bow and Arrow Roll Cast
, 30 foot Bow and Arrow, etc, by Joe Humphreys.
Here's Joe doing it on a stream and the result.
"Discovery consists of seeing what everybody has seen and thinking what nobody has thought"..........Szent-Gyorgy