Nightforce SHV 3-10x42 Illuminated Forceplex has made my short list of scopes I have an interest to mount on my 280 Remmy. Never had a chance to actually see or use one. First question is the optical quality. Is it good and does the focus stay in focus out to the edges of the scope or does it get somewhat blurred as you view the center of the scope and proceed to look at the outer perimeter while viewing through the scope? Next question: I'm confused by looking at the Kenton website. Is a custom turret available or just the ballistic strip? How does either work? Must you have the Kenton Turret or ballistic strip under the Elevation cap and remove the elevation cap each time you want to dial? Thanks