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Author Message   Ethostech Tinkerer Username: Ethostech Post Number: 168 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Saturday, November 13, 2010 - 02:37 am:    This is happening because the cocking piece in the shutter mechanism is not latching. This might be because the arrester pawl is gunked - more more likely that its spring is dislodged. If you expose the shutter mechanism and watch carefully whilst cocking the shutter, you will instantly see whatever the cause.