David - Terry: Lots of assumptions going on, and with good reason. I've used this device for years and have only met one piano with a tilt to it..and the string gauge told me so. It was on, arguably, one of the better Grand Manufacturers. Don't forget: this device is a tool, and the final test for level strings should be no sound coming from a matted hammer-to-strings. I said arguably!, -Phil Bondi(Fl)
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