That has been my same experience with the arbors on the later Piettas Richard. As well, the finish on the bolt legs and the hand are crisp and clean instead of rough as a cob. The cnc machinery also allows for smoother channels and recesses inside the frame and there are no longer so many left over buurs.
I have also found the width of the bolt to be too wide for the cylinder notches on several examples, but agree that it is an easy fix.
I still prefer the exterior fit and finish and the shape of the grip and back strap of the Uberti over the Pietta but that is just a personal whim. I currently own and shoot seven different Piettas and coming from a guy that would not own one in the past do to quality control issues says something about their efforts to make a better revolver.
One of the things I do when I 'work' a gun is to file, smooth and polish every bit I can find, including the internal channel for the hand and the hammer slot. The difference, while invisible from the outside, is immediately apparent. I pay special attention to the hammer and trigger sear surfaces, making them like polished glass with no sharp edges, and the bearing surface on the mainspring (for the hammer roller). Slick everything up with white lithium grease, and you take a 'hunnert-dolla-junker' and turn it into a diamond in the rough. For what it's worth, brassers respond to this treatment even better than steelies; polished brass frame internals slip like Teflon when greased up with WLG.
