Button Bushing Quandry

[John Delmore]

Hello List:
 
I have obstinate button bushings.  The balance rail pins are 0.143 (I know,
I know
but I’ve checked, rechecked and checked again—throughout the
keyboard, mic set at 0.146 slips right on, tightens to 0.143), and the
mortises are 7/32.  Front rail pins are 0.146, mortises ¼, even.  The 0.146
mortise sizing cauls (Spurlock) won’t fit in the button mortises.  With
Renner “Thin” bushing cloth, a 0.125 final caul gives about a perfect dry
fit.  The 0.146 final caul “will” fit, but very, very tightly (no split
buttons
yet, scary tight, though).  So, is there a source for “super-thin”
bushing cloth?  Replace buttons?  Use the 0.125 cauls and “ease on down the
road”?  Stuff in the 0.146’s and hope for the best?
 
Thanks for any advice.
 
John Delmore
 
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