If the timing is correct, I wouldn't remove any more material from the sides of the ball of the stop right now. The stop ball should be fit to the smallest notch in the cylinder, (they are not all the same), and a little gauge should be left so that there is free movement in and out of the stop slot in the cylinder.
What you could do if you haven't already, is very slightly crown and polish the high side of the ball, or the top edge on the frame (left) side. This sharp edge should be slightly broken or crowned, and the crowned edge then polished. You just want to remove the sharp edge and polish....a very little goes a long way. If you have a ceramic stone, you could rub it over the high side edge 3 or 4 times. This will crown AND polish the sharp edge. The right side, or sideplate side of the stop should not be crowned, but left sharp.
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Ret. LE, FA Instr, S&W Armorer
Last edited by armorer951; 04-05-2018 at 02:53 PM.
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