Missed this part of the reply. There is a man making curved plane key systems, it seems like a fairly natural finger movement as well, I also do not remember his name but I saw at St Chartier two years ago when I was there. The interesting thing about this is that it allows you to play strings all the way around the wheel (exposed above the soundboard of course) so you could have 40 strings available to play (exaggeration warning) and still be able to play them with a single key. Scott
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