Jim62,
You're partly correctly. Mostly it was do to it having a newer VX-2 style erector system which is a rear pivot seat system versus the old front objective tube pivot seat erector system. The old system had 30% more parts in it that could go wrong, the newer system has fewer parts in it so there is much less chance in affecting point of aim. Plus having the dual erector main spring gives equally support to the erector system this in turn is good for big bore rifle recoil action that can weaken a single erector main spring.