Seek O-roll scale used in the Ragtime Automated Music (RAM) build-up
orchestrions.  Or better yet, a tubing schematic.  I have the Reblitz
book, "The Golden Age of Automatic Musical Instruments," which has
various schematics listed on various instruments and tracker bar scales.

The last person working on this RAM instrument had completely mixed up
the tubing.  They made a poor attempt at rebuilding the stack and did
various inexplicable things and I am left to sort it all out.  A lot
of very good player techs from the New York metro area have died and
otherwise departed and it created a vacuum which has not always been
filled by the best and brightest

Bill Maguire
New York

 [ MMD articles about Ragtime Automated Music instruments are indexed at
 [ https://www.mmdigest.com/archives/KWIC/A/automated.html  -- Robbie