Hello Bob,  A few months ago Terry Smythe kindly sent me a set of
photocopied diagrams for the piano Concertola.  To me this was a most
important find as I'd been looking for that information for over 30
years.  (Obviously I did not treat it as a full-time job.)

I have sent JPEG image scans of the electrical system to Robbie and
trust that they can be posted to the MMD Archives.  There are also
pneumatic and layout drawings which I can send along later as well
if there is interest.

These diagrams are fuzzy but the information is there.  Because they
are fuzzy I have had to scan them at a high resolution so you can
extract as much as possible from them.  This means that they are
a sizeable download.

Hope this solves your problem.

Jim Heyworth

 [ Thanks, Terry and Jim.  The image files are available at
 [ http://mmd.foxtail.com/Tech/index.html
 [ "Schematic Diagrams & Drawings for Player Pianos & Organs"
 [ -- Robbie