I have a shop smithy 1239 that I traded for and I am being asked to thread a rifle bbl on it. I didnt get any paperwork with it so I am confused if its possible to cut threads with it. what little I can find on it looks like it can but I cant figure out how you decide where to start the thread. I have cut threads before on other machines and they all had that dial that had the 1-2-3-4 position on it to show where to start your thread. I always used the same number although I was told you could start on the opposit nuber also....any info would be appreciated.
Ben