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. I've played plenty of other games where the slingshots were much better. They seemed tighter and had more punch. I've replaced the rubber. I do have the correct 2 1/2" size on there. I've cleaned the coil plungers and replaced the sleeves. I've adjusted the leaf switch blades but the switches look like they've seen better days. Would replaced the switches help? Any other suggestions? Thanks.