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NRG did stop selling them at one point because of a problem.
no i do not work for NRG...also, i am not denying your comment. just saying that it was a minor problem...and is easily fixable. the problem is people were installing the dampers straight on and not at an angle. there was too much stress on the ***** and after rusting they became weak. solution: add grease and install at a slight angle to reduce stress.