Hotburn: I'm guessing here, but are you aware of the problems some of the Horton crowd are having putting xbow scopes or multiple aim point red dots on their bows? The dial a range gizmo can cause problems if it moves on ya. Some have epoxied it in one position, which is kinda too permanent for my tastes, and I've never seen one up close, but was wondering if a small set screw drilled and tapped on the edge of adj knob extending into a small, shallow, but slightly larger [clearance] hole under knob wouldn't work well?? Once you try that V-zone that dial gizmo will be history anyhow, lol. Just remember, once you get it dead on at 20, don't use the W & E adjustments anymore, just the speed ring. After you are all done w/ speed ring, you may need 1 or 2 clicks at 30 or 40 on windage. One thing about the V-zone I'm not fond of is that each click is 1/2" at 20 yds, and alot more than you'ld think at 30 and 40. Let us know!!