I have a leveling stick that I got from Steinway some years ago and one side is straight and the other side is curved. I think the key settling argument is probably the most sound one except that once the keys in the middle settle then the dip will be too shallow. Should one then remove punching to increase the dip or add punchings to the center rail to raise the key height. So many decisions. Even if someone can recognize the curve while approaching a piano from a distance even without their laser leveler, that's fairly irrelevant. The question is can they tell when they sit down to the piano in terms of how it performs. I'd be surprised but no further anecdotal evidence is required . Who knows, maybe when these pianists do runs from the center out they sense a slight bit of acceleration from running downhill. I once new a princess who could sense a pea underneath 100 mattresses. Of course that means they should encounter some resistance from going uphill from the extremes inward. I guess you have to make a choice. The crowning of the keybed seems to me to be of no consequence since the front rail of the key frame itself is rarely of uniform thickness as evidenced by the number of front rail punching required to achieve uniform dip through the set anyway. Nevertheless, I'm glad we've explored this topic thoroughly. Now I can go back to sharpening my chisels. David Love www.davidlovepianos.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20101014/4c7d0d9f/attachment.htm>
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