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Here are some ‘before and after’ pics of an unusual design of Expression Box from
a Motora powered Weber Duo Art.
The three pictures above are of the spill valve which is located centrally on the
back of this box.
These are the knife valves inside the regulators. There is no external adjustment
outside the box so the theme shaft is set slightly more open to give one degree more
Only two pouch valves instead of the more usual six and they have suffered insect
These two pics show the box refitted with control for manually operating acompaniment
and theme re-attached.
The box is rotated 90 degrees from the more usual side on arrangement.
This one shows the usual windmotor regulator and play rewind valvebox and pneumatics
but unusually a different rewind regulator and small reservoir.