The Mighty Haddorff Vertichord Piano

Some years ago my mom gave me the family piano when they moved to Seattle.  I actually don't remember how it got here - their movers must have dropped it off.  She had told me that someone told me that it was unique (vaguely implying valuable).  I finally checked into it.  The reason the Haddorff Vertichord is special is that it was a fantastic design error:

http://www.pianoworld.com/forum/ubbthreads.php/ubb/showflat/Forum/1/topic/021272/Number/0/site_id/1#import


The one thing I don't understand is that I'm comparing the Vertichord's string layout to another upright and they actually look pretty similar.  This is mine.

And here is one from
http://en.wikipedia.org/wiki/File:Upright_piano_inside.jpg

Theirs look even more vertical.
 
 But the poster is right it doesn't stay in tune for very long.  Fortunately unlike the poster's experience there aren't any glue failures in this one.  Although having said that I just checked and only 3 keys are out of tune and it's been a few months.

A plus side is that after I had one tuner out, I figured out how to tune it. (and yes, those short strings are a pain), and we use it to practice on and Terri's band uses it to rehearse with, so it actually does get played.

Regardless I am getting tired of its fussiness and and just about ready to buy a new piano sounding weighted keyboard (no room for a grand piano and we're not good enough players to really appreciate it.