[ Howard Kohlbrenner wrote in 250804 MMDigest:

> I am rebuilding an Autopiano double-valve three-tier player action
> that was previously rebuilt. I'm finding pneumatic spans between
> 1-1/8" and 1-1/4". The question is, what is the correct span?

Hi Everyone, The external spans of striker pneumatics are almost
universally 1-5/16" to 1-3/8", and the internal span around 7/8"
or so.

Pay attention to your technique on the hinges, especially to using
enough glue for a good string bond but not too much to gum up the
works. Use rubber bands to hold the pneumatics shut when gluing the
hinges.

Happy gluing,

Ben Gottfried - Ben's Player Piano Service
Richfield Springs, New York
tel.: 1-315-717-5969
https://bensplayerservice.com/