Yamaha Upright hammer flanges

[Kazuo Yoshizaki]

I'm just curious. Even if each cord is the same length, I think what's
important is the spring tension. I wonder how they adjust the spring tension
at the Yamaha factory. I suppose it must be differently set in bass range
and in treble range because the hammer weight is different. Or doesn't it
have to be so severe?

> Even easier is to wrap the cord around a dowel (appropriate size) and cut
> the cord along it's length.
> You now have equal length cords to glue in place.