Nelson,
Yes, that is the second one I made. The first one is fine. I can take it on and off a dozen times and it always repeats within .001". This second one is so I can get to within .0002". Don't feel alone trying to hold close tolerances. It is time consuming and tedious. When I build something precision, everything has to be as close to perfect as possible. You sneak up on the dimension. You take tiny cuts to not overshoot. You make one or two "ghost" passes to make sure there is no tool push off. I had to turn a shaft today .625" diameter 9 inches long. Tolerance is +/- .0002 over the length. ( It is part of the gear assembly I am making. I cut it .010" over, check the length for taper. Adjust the tailstock tiny amounts and taking a .001" cut until no taper (this took 3 passes and very small adjustments. Then I cut it .005" over, then .001 cuts until I am .002 over. Then two "ghost" passes, then "fuzz" cuts until I am .001" over, then two more "ghost passes, and finish by polishing to size. This takes hours and many passes at fine feed rate, but the reward is a perfect part.
Anyone who wants a .0002" tolerance and turns to hit i in a few passes is lucky, not skilled.