Its not just the CDS system, the issue is the internals of the scope either don't function properly from day 1, or they function properly for a certain period of time, then they fail. When you dial 5 MOA, the scope internals don't make the 5 MOA adjustment, could be more or could be less. Also, issues with returning to zero (RTZ). After you make your 5 MOA adjustment with your elevation dial, you dial back to your zero set point, but your actual POI is off, maybe as much as several MOA.I think a lot of the alleged problems with the CDS system are tied to Leupold indexing dials based on load information from the side of an ammo box that is not tied to actual chrono data, or precise elevation info.