I have installed many scopes in my life. Some install easy and are good on first try. Some are canted and become a pain in the rear to get level. I always place the base on the gun and test screw length for each screw and it's specific hole. When I am sure screw will tighten base without bottoming out, I designate it for that hole. After installing the base and torquing/locking the screws in place, I set the ring bases in place loosely and ensure correct spacing with the scope. Then I use a stainless rod to ensure the rings are straight on the base and aligned for the scope. Then I tighten and torque the ring bases to the scope base. Scope sets straight every time as I start to screw the ring caps down. I use several scope alignment techniques that work great, until I start torquing the ring caps. About 50% of the time when I finish torquing the caps, I check alignment and the reticle is off 1 or 2 degrees. I end up loosening and tightening the screws several times trying to get the reticle aligned straight. I mounted two scopes the other day. One took 15 minutes, the other over an hour, and the reticle still looks off. I checked this forum, but did not find any thread regarding sequence of tightening and torquing the screws when installing a scope. Is there a secret technique or torque sequence for tightening the ring caps that keep the scope from losing reticle alignment?