>What your system DOES allow for is a >very systematic quantification of exactly the static parameters that >result in a given Balance Weight, which in turn allows us to place our >cumulative expereriences in that perspective. But in the end, you base >your recommendations for strikeweight to strikeweight ratio matching on >subjective analysis of experience. The apparent shift in matching >reccommendations since the release of your Smart Chart a few years back >underlines this. >RicB Cheers to you Richard, You are referring to a briefly released version of the Smart Chart which had recommended SW lines for various Ratio levels that, with a given BW, will not exceed a recommended max Front Weight. I discontinued that for the very fact that it's not that cut and dry, black and white, etc. Quantitative analysis, plus qualitative analysis and cumulative experience is what works. Do the metrology analysis, look over regulation, action set up, timing, voicing, listen to what the pianist(s) says and feels, play the piano yourself, then make changes relative to all that information. Experience will tell pretty accurately what kind of a relative change to expect by changing the Strike Weight Ratio by say 0.5, or the front weight level by say 10g, or the friction level by say 5g, etc. Like cooking you have to taste the soup and make adjustments to the recipe! It's difficult to make it all an exact science because art and human subjectivity are so integral to the whole thing of pianos. Try we always will to have better control over the results of our work... Onward and Upward! David Stanwood
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