Hmmm...that kinda reminds of what happened to me the other day...
I was sitting in a local bar when a "professional" girl sat down next to me and I guess I kind of gave her the eye. She then, to break the ice and maybe make a buck or two, said to me " For 5 bucks I will do anything you can...
Just measure it all to get it right. Leupold give measurements for their rings and the measurements are from the TOP of the bases to the center line of the scope and this is true for both one inch and 30mm scopes/rings. Measure the scope at the fattest point to find the diameter and then divide...