Does anyone know the stack divide location on the Themodist?

Philip Jamison
West Chester, PA

 [ In my 1917 Stroud (Aeolian) Themodist the bass/treble split lies
 [ between E-flat and E above Middle C (keys #43 and #44).  I'm not
 [ sure, however, if the music rolls are standardized at that location.
 [ -- Robbie