Inertia, was "Grand Touch"

[Absolute Piano]

Thanks Vladan and all for all the info.

There is a lot to chew on. My interest is in the practical application. Why 
is it that two keys with the same balance weight and the same front weight 
but leads arranged differently seem to me to feel the same?

I ask because I had a customer that asked me to place all the leads closer 
to the front and to use less leads after I had already set up the FW to my 
specification in a new keyboard using a tower pattern nice and close to the 
balance rail. I went through all the trouble but as far as I or anyone else 
could tell the action felt the same.

I'm in the process of building several action models to test the science as 
I am slowly digesting it so you are all being quite helpful. Unfortunately 
with reality hanging over me it may take awhile to report back any results.

Best,

Jude Reveley, RPT
Absolute Piano Restoration, LLC
Boston, Massachusetts