Hi MMD,  I would like to draw your attention to the "Pianola
Rendezvous", which will be held later this year by the Brussels
Musical Instruments Museum (MIM) (www.mim.fgov.be).

A special web site www.pianola.be is dedicated to this event.
I quote from there:

  The "Pianola Rendezvous" is about the mechanical piano, offering a
  modest exhibition and a series of events in the concert hall of the
  Brussels mim (musical instruments museum), from 15 May until 10 June.

Walter Tenten, Germany
www.musica-mechanica.de