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Yes, read post 28.
I conceded I could find no evidence supporting the commonly-held belief that it shouldn't be used to loosen a fastener, other than a slight extra amount of wear and tear from use. Since there's no logical reason to know the torque to break something loose, that is the only reason for not using it for that purpose.
There's plenty of credible evidence that the more they are used, the more often they need calibration. There's plenty of credible evidence from tool manufacturers on the need for calibration, and the need to relieve pressure on the spring to maintain calibration.
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