SH.........The shims fix a minor problem that CVA had for awhile. How do you fix all the TC's that won't shoot conicals? Cut off the QLA? That's not an easy fix and then you don't have a QLA. CVA can build a barrel to shoot conicals and that's with a QLA.
I can give you other examples, but that one should show you who can build a better gun. Even if you are too biased to see it.