Just purchased a Nikon P-223 (3 x 32) scope along with a Nikon P-Series mount for my Colt LE6920 SOCOM. Have been relying on my BUIS, but the eyes are now needing some support. Questions: Is their a "right" location on the Picatinny rail to secure the mount? Do I need a tool that calibrates inch/lbs so that I do not over-tighten the mount to the rail? Same when securing the scope to the mount. This is my first scope and would appreciate some advice. Wish to do this project myself, rather than have it done by LGS. Thank you.