Just starting out myself, with a couple new CVA's. I too am very happy with these CVA's even though I haven't shot them yet!
I have a good background as a lifetime shooter and understood the breechplug issues and whatnot before I bought the rifles; I have a Southbend lathe in the next room, and bought a couple of extra breechplugs when I bought the guns. I'm not worried about any minor problems that may crop up.
The firing pin bushing can be a challenge. I was lucky to have a set of Brownell's bits, but it gets complicated. I was just fooling around and polishing toolmarks off my pin when I had trouble. I thought at first the screw slot was too shallow.
The firing pin is just long enough to keep the bit from bottoming out in the slot. When I get this posted I'll grind a slot in the center of the bit so that it can fit the slot. I'll order another bit for a spare.
The bit is Brownell's #340-3.