Regarding Stephen Kent Goodman's inquiry about the Welte Licensee
transfer bar (expression shifter), I discussed this component in
July of 2012 at

  http://www.mmdigest.com/archives/Digests/201207/2012.07.07.06.html 

A digital scan of the referenced original Welte blueprint which
documents two designs of the item is at

  http://www.mmdigest.com/Gallery/Tech/jgrant01.html 

While it is not the easiest diagram to read, there should be
sufficient information there to allow an accurate re-tubing of the
device, assuming it is of a contemporary vintage.  A hand-drawn
diagram by Harold Goldberg, of unspecified vintage, is at

  http://www.mmdigest.com/Gallery/Tech/hgoldberg01.html 

John Grant
Baltimore, Maryland