I'm in the process of rebuilding a Simplex player and have come across a
curious tubing configuration on the tracker bar.  It seems that the
tracker bar has 92 holes plus the sustain pedal hole.  The last two holes
on either side are connected together and then extend to their respective
ends of the stack presumably to the regulator controlling each half of
the stack.

This configuration leaves me with the impression it is meant to play
Themodist rolls.  Is this correct?   Did most Simplex players have
this feature?

Ed Chabon