I have a Nelson-Wiggen Style 6 which was rebuilt some years ago and
the tubing appears to have not been properly set up to handle the
somewhat complicated duplexing mechanism in the piano.

The Nelson-Wiggen Style 6 plays a 'G' roll, but the piano --
besides having the traditional three bass drum beaters, snare drum,
and triangle -- also has a wood block, tambourine, and castanets that
work off a duplexing mechanism so that when the soft pedal (and
possibly mandolin) operates, the perforations normally used by the
bass drum and snare drum alternatively operate these other instruments.
The operation is similar in the Seeburg KT Special.  I would be
interested in hearing from anyone with a similar machine that they
believe is tubed and operating correctly.

I am especially interested in tubing diagrams from the duplexers to
the other instruments.  There appear to be two duplexers to the left of
the rewind box that operate separately on the soft pedal and mandolin.
There is also a valve and pneumatic mechanism near the top of the piano
that appears to work with drum volume.  There are also some junction
blocks and valve assemblies tied into these systems that are hard to
identify.  Any help would be appreciated.

Glenn Thomas
Princeton, New Jersey