I recently tuned two import grands with significant squeaks on every note as the key began to be depressed. In neither case did I have the time to pull the action to confirm diagnosis, but I expect to return and treat the knuckles. What is currently the BEST standard practice in eliminating the problem. I understand that a number of techs are using powdered Teflon products. Is there a consensus on using these products? Thank you, Bill Simon Phoenix
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