Apropos for Halloween...Just watching the dismantling and cleaning of the shutter escapement was terrifying. I once mistakenly dumped the blades out of an Elmar 50mm Focomat IIB lens while cleaning the elements and spent a week, working at least two hours a day, trying to get shutter blades back in...I had to make a tool using a paperclip to hold the blades down in place while inserting the last one in.