Hello MMDers.  I would caution readers regarding John Grant's
latest post of sanding the roll while the it is rewinding.  I do
not own any pianos or collections of music rolls of this type, but
I am a woodworker.  I believe that sanding while the roll rewinds
runs the risk of getting sanding grit, paper dust, etc. caught up
within the roll as well as possibly going into the tracker bar by
way of the vacuum.  That is my two-cents worth.

Charles Davis
Beaumont, California