Several years ago I had a Kimball Electramatic organ but I had only a
few Electramatic rolls.  It would play QRS and other 88-note standard
rolls but they sounded choppy.

I discovered that if I played Ampico rolls on the Kimball, it sounded
much better.  The note extensions punched into the Ampico rolls avoids
the choppy sounds encountered with 88-note rolls.

Tape the bass and treble tracker-bar holes to prevent the Ampico
expression holes from playing extraneous notes.  Try it.  It produces
very listenable music on the Kimball.

Roger Anderson