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Autopiano Action Pneumatic Span
By Howard Kohlbrenner 

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?

Howard Kohlbrenner

(Message sent Mon, 4 Aug 2025 12:14:57 -0700 , from time zone -0700.)

Key Words in Subject:  Action, Autopiano, Pneumatic, Span
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