By chance, I discovered a "simple" and TEMPORARY technique to get a 
ciphering Simplex or similar unit pneumatic to work normally.

Disclaimer: This method is NOT a proven guarantee to fix a ciphering note!

1. Unscrew or pry the unit pneumatic from the main board, making sure the 
break is clean.
2. Grip the pneumatic firmly with one or two hands and vigorously shake it 
in an all-around circular motion. This will cause loose shellac particles 
or foreign bits of stuff to fall out of the main pneumatic opening and out 
from the top valve seat and pouch input channel.
3. Reinstall the pneumatic and test it again.

In my case, the ciphering pneumatic worked just like it should have, after 
I did the above procedure. I thought I would share this procedure with 
others who may have the same problem with their unit pneumatics.

P.S. You can probably forget about this procedure if your player "played 
well, back in 1930 when Grandpa got it new."

Luke Myers 
ldmyers95@gmail.com.geentroep [remove .geentroep to use]