Now Chris when you bore your jaws they are only bored precisely to that diameter. Open the jaws and chuck up on a different diameter and it won't be the same. Now I don't think that Russell is a liar I think that he don't know or completely understand how small of a tolerance he's talking about. You know when I had you lathe I had a hard time getting .001. But I did and it took a lot of work. So when I called tag and talked to cliff and he told me that if I could get .001 I was doing great. Because typical tir of the chuck is .003. That is when I decided to upgrade to a machine lathe. And it was the best decision I made when I was building cues.
You are correct. Near Zero run out at the large diameter you bored it to and within .002 throughout the rest of the scroll is the goal. I just learned the jaw tapping method recently compared to my old cigarette paper wedging of jaws and pushing with the thumb. I was actually surprised myself when I saw how good that method worked.
And guess where I learned it?
You guessed it. Right here on AZ from some of my customers. It sure made life easier on me. And people can learn things from less experienced people if they are teachable.