The 40/2.8 Sonnar RF purchased new from Robert White had a build quality typical of CV, i.e. less than ZM and Leica. The focusing mount has a slight play and the rf focus needed minor tweeking for optimal sharpness, but I tend to be pickier than some. Fortunately DAG corrected both problems at a reasonable cost. Once properly adjusted, image quality is as good as anything I've tried from Leica.
<a href='http://www.rangefinderforum.com/photopost/showgallery.php?cat=500&ppuser=2121'>My Gallery</a>