In response to the post on the 080925 MMD, I'll suggest a few things on
regulating the sustain pedal action.  Firstly, the action of the piano
itself should be checked: when you push the sustain pedal, _all_ the
dampers should lift at precisely the same time.

Check this by pulling the action out, loosening the setscrews on the
damper levers that secure the damper wires, set the damper lever height
so the damper will lift when the key is halfway depressed, and
retighten the setscrew.

The critical thing (especially in a player) is absolute uniformity so
the dampers all lift together.  Some player grands have an additional
regulating screw in the damper lever to fine-tune the adjustment so the
dampers all lift in unison.

Once the piano itself is regulated properly, adjust the sustain pedal
pneumatic linkage so that there is almost no lost motion between the
pneumatic action and the damper lift tray, then adjust the pneumatic
limit screw (thumb screw, wing nut) so that it lifts the dampers just
enough so the wedge dampers in the bass and midrange clear the strings.

The idea is to have this rather large pneumatic move as little as
possible to accomplish its job so that it uses less vacuum -- the less
it moves, the closer you can set the valve travel to get snappy, yet
efficient action.

John Runge