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Old 11-24-2013, 04:37 PM   #4
woodsman
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Join Date: Feb 2013
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I'd say you're going to have to look for 'witness' marks- that is, points of contact that shouldn't exist. Or, you could spray one surface with paint and after fitting the two together, see where the paint rubbed off. Then use some laquer thinner to quickly wipe off the paint that you've sprayed ( obviously not on the lens!).
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