I just wanted to report that in the interests of spreading free information about the Yamaha U3 / U3M, I am creating a series of web pages that cover this topic. This morning I made the following Yamaha U3 page and last week I made this Yamaha U3 / U3H page. For now, there is not much to read but I hope to develop each site to cover a different aspect of the excellent Yamaha U3 piano.
I hope this is useful to some people.
Mark Goodwin Pianos, based in Royton, Manchester