Hi RA. Sounds like you've done a lot of scope work so maybe you can help me. How do "plumb" the crosshairs? If the scope is turned in the rings and I adjust for elevation it also changes windage. Is there a point on a rifle that you can use as a reference point? The last few I've put on, I center the crosshairs in the scope and lock the gun in the vise. I use a laser bore site at 25 yds. Then I use the coarse adjustment to get on the dot left to right. I bring the crosshairs down to the dot. Then I turn the scope in the rings until the crosshair is at it's highest point. I think that must be straight up and down. Appreciate any input.