I may get a Talley top half ring scope level. My Usual Scope Leveling Process 1. level the rifle with clamps & a level 2. mount the scope with vertical reticle on a plumb bob line 3. gradually criss-cross tighten screws to 20 inch lbs. Adding the Talley top half ring level: 1. keep rifle clamped level 2. mount bubble level top ring half 3. very slowly tighten the 4 ring screws (X pattern) and use valve feeler gauge shims to ensure equal gaps between both sides of ring halves. 4. keep checking for a "level bubble level" 5. tighten to 20 in.lbs. Comments? Suggestions? Eric B.