Re Craig Brougher's further remarks, my trouble is that I've only
talked to people who've taken a Kastonome to bits, and I've not done
it myself.  I see no problem in having two lots of pouches sitting in
two lots of suction: the theme valve simply behaves like an ordinary
secondary but instead of switching between suction and atmosphere and
feeding a pneumatic, it switches between high and low suction and feeds
a secondary valve, which then switches between that and atmosphere !

However, things are complicated because someone has told me that the
valves are concentric and in one mounting.  I also see from Douglas
Bush's diagram in MMD 990920 that the columns of theme ports have
adjacent notes in them, whereas I was sure from examining rolls that
adjacent notes were in horizontal rows.  This means a whole section
of chromatic scale could much more easily be falsely themed as a single
theme perforation chased it down (or up) the nine-note theme-port
column.

Either there were two quite different Kastonomes, or my memory is so
poor I should desist from commenting further !

Dan Wilson, London