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Author Message   John_s Tinkerer Username: John_s Post Number: 16 Registered: 07-2009 Rating: N/A Votes: 0 Posted on Thursday, March 25, 2010 - 01:04 pm:    Re dropping screws and small parts: always work over a large tray or similar. Many screws are non magnetic. I've found cotton buds (Q tips) excellent for cleaning small lenses, just tease out the end slightly to make it a little larger and softer. Choose the better quality ones, some aren't suitable being a little rough. I've got an old pair of metal dividers which are useful for unscrewing lenses. You have to be careful they don't slip and scratch the retaining ring though. The correct spanner would be ideal of course.