I send in my M9 to Leica New Jersey to have them adjust the rangefinder which was front focusing ! They told me to send it in with a few lenses and they would adjust them to the camera . I send my 50 LUX and 35FLE after 3 weeks I got the camera and lenses back , the replaced the Sensor, circuit board ,adjust the rangefinder and a few other things . They fixed the rattling of the shutterblades on the 35 FLE , lubed the lenses everything works like new and it as sharp as can be.
The camera was out of warranty , the service was free!
Kudos to Leica for taking care of this .