Speaking of "rapid action turrets," How do they work? I mean, I get the windage and elevation, but trying to get some instruction on how the turrets actually work, what they do, and how to operate them is a mystery to me. Amazingly, Nikon offers no instruction on the use of these. I have the scope mounted and ready to sight in, but I would like to have some detail on how the turrets work. Anyone wishing to instruct me would be appreciated.