Dear list, Andre writes: >I have a question, why should the distance between hammerail and bachcheck be 2 mm? This is the same specification as Steinway, with Steinway backchecks installed at 72 degrees from horizontal. This is certainly because the intersections of the arcs of hammer travel and backcheck travel are most efficient (i.e. steal the least amount of energy) in this configuration. The 72 degrees we don't adhere to religiously, as slight variations can improve checking according to differences in action spread and hammer tail shape. >BTW Are you "an American in Paris" ?(that lovely Paris) Yes, indeed. For fifteen years now. But I still don't dance like Gene Kelly. I love Amsterdam. Jerry Anderson
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