Dear David, Thanks to you and Bill Ballard for sharing your information and data here on Pianotech. I am curious about a couple of points. Have you had a chance to evaluate strike ratio of modern Yamaha and Kawai actions, and how do they compare to your ideal of 5.5 of the Hamburg Steinway? Next, I've wondered about the effect of wippen assist springs as used on some Schwander and now Korean actions. Are there situations where the springs (if quite strong) hurt repetition speed and reliability by working against jack return? Thanks again for your work! Bill Spurlock
This PTG archive page provided courtesy of Moy Piano Service, LLC