Stefan, I've owned an M6 for about 14 years, along with a few M2's and M4's over the years. The flaring of the rangefinder patch on the M6 has always been annoying for me, at times making it difficult to focus. I have a .58 MP that is wonderful to focus, better even than my M4. The MP never flares. Period. I finally broke down and had the condenser added to my M6, making it like that in the MP. It's a HUGE improvement and makes my M6 just as clear and flare-free as my MP. Leica is finally releasing the parts needed for this upgrade to independent repair people. Perhaps you can find someone in your part of the world that can do it for you. If you are as bothered by the flaring as your post indicates you'll REALLY love your M6 after the upgrade.