Nice setup. Just to clarify. The wood support does not attach to the keyboard, rather just rests on the back of the keyboard for support. Thus once the complete music rack is removed, the keyboard will fit into a case. Correct?
Stephen, did you have to drill holes and cut the plexiglass? If so, how? I've always had trouble working with plexiglass. I believe you can sand the edges with sandpaper to remove the sharpness and get more of a beveled edge.
For the record, the music rack design for some of Yamaha's arrangers were just plain awful, but we already knew that.