Hi Terry, Increasing the dip (by as little as .050" many make a difference), increasing letoff slightly (by as much as .250" as in Yamaha's "silent pianos"), lengthening the check distance slightly, and lengthening the hammer blow distance will also increase the 'perceived' touch weight, without adding external weight. Increasing the pressure of all the action springs slightly will also add resistance. I'd try one of these at a time, and perhaps building them in combination, without significantly sacrificing action response, asking the customer their opinion (using THEIR sensory apparatus for calibration) until you get what they want. A. Wright
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