I am sending the attached file for you to place in the MMD Archives,
in case someone would find it useful.  It is my version of the Ampico A
grand tubing diagram, done in the style of a London Underground map.

Bill Luecht

 [ Ampico A Grand Tubing Diagram (575 kb)
 [ http://www.mmdigest.com/Attachments/15/04/07/150407_084859_AMPTUBE-24X36.pdf