I love hunting with my PU Sniper. It was my primary rifle last winter, but I never got a shot at any deer. This might have been a good thing, because I dont know if I ever could have worked the safety in time, especially when it was super cold and I lost dexterity in my hands. I still want to use it again, but the safety issue needs to be mended. I've been looking at cocking knob modifications that add an easy to grip ring, and I wanted to know anyone's opinion on them. I see the expensive Brass Stacker one is a clamp on. Does anyone have any experience with them?