Capstan location in an upright is as important as it is in a grand piano because it is the only element that defines the leverage of the key. What you should be concerned with is the touch weight. Measure the up and down weight and average the two. This number should be between 34 and 40. If it exceeds 40 then you do have a problem BUT I would consider moving the key frame before moving the capstans or messing with the wippen rail. In other words, if it ain't broke, don't fix it. Factories can and do make mistakes, after all, it is an American factory and they make pianos no better than they make cars of Sears tools or washing machines. Some do better than others, Kimball and Mason & Hamlin come to mind, but never assume that the factory made it perfect, no such animal BUT you really need to investigate and UNDERSTAND any problem you try to fix and understand the consequences and make darned sure you can undo your change unless you REALLY know what you are doing. Don't make work for yourself that you needn't. Newton
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