<https://forums.musicplayer.com/topic/141625-new-project-steinway/#comment-2136086>
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"Jeff, forget the DIY approach on the action.  A good tech will get stunning results out of your action.  Nobody else will.  To equip yourself with the tools and supplies necessary will cost you more than having it done by a pro.  Key easing pliers are used for nothing else on earth and can do serious damage in the wrong hands.  A Steinway capstan wrench is used for nothing else on earth.     \nOf all your problems, the sound board buzz is the only one I'd recommend going after yourself.   "
<https://forums.musicplayer.com/topic/141625-new-project-steinway/>