I have recently purchased a Voere Titan II. It had mounts on it already, but I really didn't notice how uneven they are. The front mount is way higher than the rear mount. So of course the rings are uneven. I even put a low ring in the front and high ring in the back, but the front mount is still higher, not by much though. Should I consider shimming the back? I hope someone can help me out there!! Thanks!