<p>Brewer,<br>
Please keep this updated. I have a Summitar with similar issues.<br>
Also I found two articles may be useful to you:<br>
http://www.rangefinderforum.com/forums/showthread.php?p=2569060<br>
http://lens-cla.blogspot.com/2014/02/leica-leitz-summitar-5cm-f20-lens-group.html</p>