I was recently inspired by a YouTube video created by Joe Pieczynski. He demonstrated how to machine stops mounted to the face of his 3 jaw chuck that insured the part's front and back faces were almost perfectly parallel. Great idea but I got cold feet thinking about the holes he wanted me to drill in my chuck. This article describes a variation that is almost as good but does not risk me ruining my chuck.
If you are interested, please see
Your comments are welcome. All of us are smarter than any one of us.