Something else to mention. The 30mm Zee rings only come with +/- 10 or 0 inserts. If they had the +/- 20 for the 30 like the 1" rings I'd be in good shape. That being said, depending on what happens at the range tomorrow, there is one more thing I can do. That is put a shim under one side of the mount to correct windage. I would use JB weld as filler as before. I should be able to make any further corrections this way. I'm guessing what was said earlier is likely correct, my receiver is twisted.