There is no easy way. It is a major pain in the a$$. I have left both my MBWs at a point that is good enough, but I am still not 100% happy. Once the window is magnified under the cyclops, any misalignment is obvious. Out of 31 days, I would say 25 or so are nice, I wear a different watch on the bad days.
I would recommend a 30 min epoxy. I need all the time I can get.
Sand the old date disk to the metal if you can since you will be making it thicker, you will need the extra clearance.
Good luck!