In the mid 1970's I spent an evening at Joseph Tushinsky's home and saw
the Vorsetzer that his people had built that would play all the types
of reproducing pianos.  Robbie Rhodes described the mechanism quite
accurately.

I ran across some old business records today and I noticed the Welte
Licensee grand, with the side cabinet with the 10-roll changer, I had
sold unrestored to Mr. Tushinsky for $2600 in 10/18/1968.

Ellsworth Johnson
Spokane, WA USA