I enjoyed Tony Marsico's article and agree with him 100%.  One thing
that has not been mentioned is: What modifications are required to
modify a 9' grand to make it accept a reproducing unit?

Does the frame of the piano require cutting a slot under the key bed?
Will this cut damage or weaken the piano?  Can you imagine cutting a
slot under the keybed and suddenly hearing a loud bang, and finding a
perfectly good 9' piano ruined?

I would like to know more about this modification before any attempts
are made.

Bruce Clark

 [ I think that's exactly how PianoDisc and Disklavier systems are
 [ installed in new Yamaha grand pianos.  -- Robbie