key bushings

[Charles Neuman]

For those of you who use cauls for replacing key bushings, I'm curious 
if you have a favorite size to use. I am taught that the balance rail 
bushing should be sized to be 0-.002" larger than the balance rail pin 
size, and the front rail bushing should be .004-.007" larger than the 
front rail pin width.

For .145" pins, I guess it would be reasonable to choose a .147" caul 
for the balance rail bushing and a .150" caul for the front rail bushing.

Does anybody prefer a different approach to choosing the size? Do some 
people like them to be snugger?

Thanks,

Charles Neuman