Stanwood action

[grandpianoguy]

Any of you have experience playing a piano outfitted with one these? I'm especially interested in "before and after" experiences. 

[gfiore]

Before, uneven, high touchweight, and high inertia from too many key leads to overcome poor action geometry. After, a lighter, very even and responsive  action.
 Stanwood is mainly used to remedy poorly performing actions where the manufacturer paid little attention to action set-up(geometry, hammer weights, and key leading patterns).

[allthumbs]

Before, uneven, high touchweight, and high inertia from too many key leads to overcome poor action geometry. After, a lighter, very even and responsive  action.
 Stanwood is mainly used to remedy poorly performing actions where the manufacturer paid little attention to action set-up(geometry, hammer weights, and key leading patterns).

gfiore

Would a piano with a superior and properly maintained action such as Renner, benefit from this kind of treatment?

Cheers

allthumbs

[gfiore]

Yes it could. It all depends on how carefully the manufacturer sets up the action, be it Renner, Steinway, or any other. In other words,  a manufacturer like Bosendorfer, who uses Renner would'nt benefit much at all from Stanwood, whereas manufacturer X from China who uses Renner would benefit. Mostly because they might not have the experience in setting up an action with regards to proper geometry, key leverage ratios, and correct hammer weights.

[grandpianoguy]

So why do hear you about people with presumably decent pianos like Hamburg Steinway Cs with Renner actions say what a a positive change the Stanwood system has made? And why would anyone bother to spend what must be a significant amount of money to put a Stanwood system into a Pearl River or other lesser instrument?