[pianotech] center pin function

[Ron Nossaman]

Keith McGavern wrote:
> Dear persons,
> 
> I found this an interesting question as well as a response.
> 
> My understanding and practice to date dictates that when the center pin 
> is pinned properly, the center pin does not move or rotate at all.
> 
> I am fairly certain that is what Al meant to say, but semantics may have 
> got in the way.
> 
> Keith

Picky picky picky. In an upright hammer butt, the center pin 
moves and the bushing doesn't, and he *did* ask about the 
hammer butt pin.

Ron N