It's been my experience that the fulcrum migrates forwards as the key is depressed. At rest, the key is bearing on the back of the punching and at full dip on the front of the punching. Also, if a punching is glued to the bottom of the key, does that not change the KR some with the added height because the fulcrum is now at the bottom of the punching instead of the bottom of the key? -- Regards, Jon Page
This PTG archive page provided courtesy of Moy Piano Service, LLC