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Author Message   Thomas1 Tinkerer Username: Thomas1 Post Number: 21 Registered: 02-2011 Rating: N/A Votes: 0 Posted on Friday, June 08, 2012 - 05:13 pm:    After removing the bottom plate of the Canon 7s I found the shutter brake or damper spring installed improperly - no tension on the spring - I do not know if this contributed to the shutter curtain tear but hopefully with a shutter unit replacement - the whole bottom mechanism replacement will have everything right.