jack springs in drop action

[J Patrick Draine]

On Jun 4, 2004, at 4:09 AM, Dave Nereson wrote:

>
>     If it's only six, reach in with a hemostat, yank 'em out and put 
> new
> ones.

Am I the only one who recalls Jim Harvey's Rule of Sixes, to whit, that 
if a half dozen of a set of piano components is failing, that's a clear 
indicator that further trouble is just past the horizon.
Statistics fans, that's 6.8% of a set failing (and my vague vague 
recollection from my sole stat class 30 years ago is that's hovering 
around a typical standard deviation threshold).

Patrick