The reason I asked this question, originally, was because a couple individuals told me that if the receiver holes were drilled/tapped just a smidge off, it would throw the ring alignment out of whack, and when the scope is put in the rings, and tightened down, it would torque the scope. I dont know how true this is, and I was wondering if anyone had this happen to them. I, personally, love the concept of DD, and I dont see a use for the rear base`s lateral adjustment on regular Leupold mounts. (Cant any left/right zeroing be done using the scope`s internal adjustments?)