<< knuckles to install and the wood core is slightly narrower than the slot (it reaches the bottom). Is it acceptable to install and let the glue fill in the gap or should I shim it with paper or anything else? Or is it un >> The integrity of the shank assembly is critical. Upon impact, the transient forces will make a rattle out of virtually anything that is not tight. A good, high solids glue should be ample for this, but it is really important that the cores are exactly perpendicular to the shank and that you have a consistant distance the center pin. Otherwise, the resulting erratic geometry will interject a variable into your regulation. Regards, Ed Foote RPT http://www.uk-piano.org/edfoote/index.html www.uk-piano.org/edfoote/well_tempered_piano.html
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