Hi Russ,  Saw your posting on the MMD regarding MIDI files of piano
rolls.  I have over 1400 such files (from Ampico rolls), set to play on
a PianoDisc.  I used to own one, and still have a PianoDisc control box
connected to my Disklavier.

For all the details, see my web site at http://www.petersmidi.com/
I reckon they sound great, but you can hear for yourself by downloading
the sample files.  Email me anytime for further info.

Peter Phillips
http://members.optushome.com.au/eleced/index.htm