I have the sa3135 in a ym, and I have had zero problems. I believe its because I don't mess with it at all. When I do need to wind it and set the time an date, I am very gentle with it because of all the news about the thinner stem etc. Believe me, I have tried to change the markers on sub dials, and it is way more difficult than you can imagine. It seems like a simple task, remove the markers you want, install them in another dial. Very very hard to do without destroying the luminous. I suggest you find the dial with the markers you want and install the complete dial. You will thank me if you do. If you try to change the makers, you will find out the hard way exactly what Im talking about. Good luck