Yamaha tech support in the USA emailed me with the address of a new Yamaha discussion site. Here it is if anyone is interested.
George Kaye
Kaye's Music Scene
Reseda, California http://www.yamahatalk.com/cgi-bin/bb/for...1000&LastLogin=
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George Kaye
Kaye's Music Scene (Closed after 51 years)
West Hills, California
(Retired 2021)