I'm restoring my Chickering Ampico (1928) Upright, but somebody in 1990
try to retubing part of the bottom tubes; I have "The Ampico Reproducing
Piano - Inspector's reference book" (1923), and in it only shows the
Expression Mechanism for the Treble, the Bass is symmetric, but not the
same. Can anybody help me with the correct tubes position from the
Automatic Expression cut out block to the Expression mechanism (Bass &
Treble)?

Horacio Asborno from Patagonia Argentina