Hmmm . . . lets get the terminoligy sorted first and please correct me if I'm wrong, here.
I'd expect all these chrome sleeves will all be "hard chromed".
This is just a description of the chroming process as applied to the engineering requirements as distinct from decorative chrome. For instance, the structural integrity of decorative chrome isn't very important.
Microcasting is a method of precision casting that permits, among other things, a higher content of silicon than could readily be achieved using bar stock.
CNC machining is just a computer controlled lathe that permits repeatability within fine tolerances for larger runs. Even the Microcast piston will be CNC machined I'd expect.
Then the Novarossi marketing guys get involved and we now have no idea what they are trying to sell us, or for how much.
