I doubt anyone has built one, just think of adjusting the leverage of each key, the action, sheesh. I did meet someone who wanted one, plus an additional octave on the top and one on the bottom. I told him I couldn't think of anyone who could have tuned it. Certainly not I. I got limits and they are 8 octaves. I have tuned enough barfendorfers to get used to them. Anyway, have a good weekend. Go see Harry Potter. Newton
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