I have an Atlas lathe Model 3986 Serial 103424 that is invery good condition. I would like to find a way to slow the longitudinal traveldown from the .004. I have been on You Tube and saw the method used by TubalCain, which may be fine, but not good for me. I saw someplace where someonechanged some gears and got the travel down to a .002 per rev of the spindle but I don’t Have any details. I do havelimited capability to cut gears but have not yet figured out exactly how to doit. I’m at a loss for the starting point if anyone can help.