Loose flange on let up? NOT

[Baldwin Yamaha Piano Centre]

Baldwin Yamaha Piano Centre wrote:
> 
> Hi Mike,
>           Two more thoughts after your clarification. Point one, the
> knuckles not solid in the mortice slot can cause this problem, they can
> appear tight but the only sure way is to pull one and reglue.
> Point two, those teflon bushings (hammer flange) can make a hell of a
> racket, with very little feelable motion, a quick check is to raise the
> hammers to the horizontal,let drop and observe the bounce. if there is
> more bounce than the other notes you have isolated the problem. Wippen
> flanges seem to be able to wear to a greater degree with out causing the
> problem that you have mentioned.
>  If you switch the hammers first it will isolate shank from wippen as
> the cause of the problem.
> Have a nice day.
> Roger Jolly.