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Author Message   Marty Tinkerer Username: Marty Post Number: 22 Registered: 11-2008 Rating: N/A Votes: 0 Posted on Wednesday, May 06, 2009 - 05:59 pm:    I'd also be very careful not to tap too hard or too much... The metal can expand slightly, and pretty soon you have a sort of wavy bulge. Take it very slowly... you can always tap more, but you can't back up and tap less. (I have to admit I haven't done this with a camera, but also collect old flashlights.) Marty