I was surfing Vintage Machinery website, Keith Rucker, and he has tons of machinery manuals. I looked at the American Pacemaker, which is supposed to be a top notch lathe. What astounded me more than anything else, was that in the last several pages of the manual, it gives examples of work that can be performed on the lathe, including specific procedures, speeds, feeds, and times. Have a look. On the Rotor Shaft, it state that it should take a net time of 31 minutes. Man, it would take me the whole day to do that!