With the controversy over a full "B" and half "B", I'm curious which my
Knabe grand has.  Is there anyway a non-tech -- me -- can check his
piano to see.  A possible clue:  It has a control lever underneath on
the right side at the curve, that varies the volume.

Thanks, Jim Moore

 [ My old-style (cheap) stack had push-rods, tipped with graphited
 [ dowels, which went directly from the pneumatics through a stationary
 [ guide to the piano action.  In the proper 1929 stack there is a
 [ collar on the push rod which rests upon the guide, and the guide
 [ moves with the soft pedal command, to reduce the lost motion at the
 [ pneumatics when the keys dip.
 [
 [ The other deviation from the 1929 standard in my piano was that the
 [ curtain valve regulators were separate units, instead of being glued
 [ on the top of the stack.  -- Robbie