I have a real nice Voigtlander Vito CLR with everything looking nice and / or working except the shutter leaves stick. Bob Shell advised me of this problem when I gave him the symptoms and he was correct and I did get it working at all speeds once but it sticks when not used for a couple hours. The lens / shutter should be flushed with lighter fluid. I would like to get it professionally cleaned but the market value does not warrant that. Could anyone tell me how to take the shutter or lens apart so I can get at it? I think it starts with loosening the set screws on the focusing ring. Thanks in advance. Roger