Quoted from phillyfan64:Is there a trick to improve how much 'zip' slingshots have? On my Mata Hari I think the slingshots could be stronger. If the ball hits dead center on the slingshots, they work pretty well. If the ball hits off center on the slingshots, they seem kind of weak and sloppy to me.
How sloppy is the pivot on the sling arm? Those can get very loose and have a lot of side slop in them, reducing the strength and accuracy of the sling action on the ball.
Alan