Got some 066 pictures of cylinder quality, before, and after, install? What happened to make it run better than OEM? Some? Nothing? Lots? Did it fit?
The Cross/MMWS P&C comes with larger ports than stock and generally better port timing. The only work I did on the cylinder was to makes sure the bevels on the ports were good, which I recommend anyone who uses a AM cylinder do.
You can see my saw before & after in the youtube section of the HL Supply website.
The Cross P&C comes with caber rings, and I really also like the piston, lighter than OEM and has skirts.
I doubt they are as durable as OEM, but a lot cheaper and a performance boost to boot. Not a bad combo. I re used the OEM pin, bearing + clips.