Looking for some recommendations if I need to have some older EF lenses repaired. For instance, my trusty EF 20-35/2.8L has developed a rattle inside that sounds suspiciously like a loose element. I live in the Midwest USA but no problem in shipping anywhere in the States. If you have had good luck with any shop(s), would appreciate contact info. Thanks in advance. (Apologies if this thread has been asked before. If so, where can I find previous info?)