technique is very simple indeed. I hold the staff in
both hands and in one sweep bring the tip up and forwards
in a vertical plane. The weight of the stone causes
the cup to flip upwards, and carry the loop of
the free string off the hook on the end of the staff.
It worked for me first time, and every time since. I
find that I can comfortably sling larger stones than
I would use with a normal hand sling, although the range
I get is not much improved. The staff gives me a longer
lever, and perhaps more importantly the ability to use
both hands in the slinging action.
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