Hello everyone,  I should have my Hupfeld Solophonola finished in
a month or two, and I need advice or information regarding how to
set up all the adjustable parts.  For example I've read that there
is an adjustable spring in the main reservoir, and I've also seen a
regulating pneumatic and slider valve on the side of the sustain pedal
mechanism -- missing a probably essential spring of unknown stiffness.

Does anyone have a booklet or the like which may have been sold with
such an instrument?

Many thanks,
James Senior