[ Ed Weirich wrote in 190411 MMDigest:

> Does anyone have any information on regulating the Staib-Abendschien
> "Mastertouch" piano action installed in player pianos? I have Arthur
> Reblitz's book on regulation, etc. However, the action shown in the
> book only helps with the more common adjustments which I have been
> able to do. The lack of information on the Internet is discouraging.

John Rhodes, my brother in Vancouver, Washington, writes about
piano actions and regulation for Piano Technicians Journal.  Ref.
http://www.ptg.org/document/piano-technicians-guild-publications/16/ 

Based on the patent description and the photograph of the action [links
below], John suggests the Staib-Abendschien action regulation steps in
the attached annotated image.  The dimensions shown are suggested as
a starting point.  Mechanical repairs should be completed before the
action receives final regulation.

Robbie Rhodes, MMD

 [ Staib-Abendschein action patent
 [ http://www.mmdigest.com/Attachments/19/04/30/190430_202237_US1126931.pdf 
 [
 [ Staib-Abendschein action regulation steps
 [ http://www.mmdigest.com/Attachments/19/04/30/190430_173109_Staib-Abendschein1.jpg
 

 [ MMD articles about this rarely seen piano action are indexed at
 [ https://www.mmdigest.com/Archives/KWIC/S/staib_abendschein.html 
 [ -- Robbie