I use the speed bead . Had neck surgery three years ago on five vertebra in my neck fused and a titanium plate so it doesn't bend like it used to the speed bead helped me over come this because now I don't have to try and look down the rib. One neat thing is I put a dot on paper and saw my pattern was shooting high right so adjusted for that. I hunt crows first time out got 43 not my best but way better than I was doing after surgery before installing it. wont say its for everyone but in my situation helped greatly.