Well, as far as the CNC part goes, I just happened to come across a vidja from another feller doing the same thing to the same saw. (seems to be trending) I was fairly curious on how the machine was set up and cut etc. compared to a lathe that's now old and obsolete, yeah right.

Anyways, what I took notice of first was that the placement of the "index" tool was quite unique to me, in that it only took four points from the top of the bore in a cross pattern and four points from each corner of the base. The setup was off .005" on the base and reset itself to true the base up and line up the bore. Which is quite different from myself of aligning the bore and thus truing the band and base to the bore. To me it's kind of like a gunsmith doing an action job to the outside of the barrel and not the bore where it counts. Which kind of negates the accuracy claims of the machine if it's not used properly. So, at the end of the day, it all comes down to how you use it for it to be beneficial to a harmonious outcome.
It did do the exhaust port, not the transfers, those were done by hand as well as all the chamfering and polishing. Which probably took longer than the entire set up and marching combined in the CNC, so it is a time saver vs a lathe. It(the cnc) is also making parts all night being fed by a robotic arm to help make it pay, which is something I could never see doing with my "One at a timing".
Here's a vidja I did a couple years ago showing how I align the bore to cut the squish band. Y'all can decide for yourselves what you think is right.