[pianotech] tightening balance hole was Bouncing Bostons

[Ron Nossaman]

William Monroe wrote:
> I won't speak for JD, but when I do this job, I use a similar process, 
> but use 1/4 sawn poplar for the insert.  

I use poplar too, for buttons, shoes, and such. It's harder 
than what was originally there, but not hard enough to make noise.

Whatever works, works.
Ron N