[pianotech] tuning pins

[Ron Nossaman]

On 9/28/2010 4:09 PM, Terry Farrell wrote:
> I don't remember what brand, but I have also noted new tuning pins that
> are not round. But how do you conclude that slight imperfections in
> roundness contribute to pin jumpiness?

Thank you, that someone (anyone) besides me asked.
Ron N