S&S D with high strings/low action stack

[Andrew and Rebeca Anderson]

Fellow techs,

I just finished a rough (last minute hurried) regulation on S&S D for 
the university here on the eve of a concert.  The hammers got a very 
light filing for the first time (I suspect).  They appear to be 
over-striking.  The drop screws were backed right up against the 
hammer shanks and I need more.  The angle from the jack to the 
knuckles is not great looking either (bent line to knuckle spline).

After first having bedded the center rail of the key-frame (it was 
floating) I then re-levelled the keys.  There is not a whole lot of 
extra room to the fall-board.  There is a lot of room between the 
hammer shanks and the tuning pin-block.  You can probably see where 
I'm going with this and I'm not crazy about changing checking.

I'm going back to get some actual measurements to assess the best way 
to retrieve this four-your-old piano.  They're so pleased with the 
results so far that they think they will afford to have it done 
right.  What measurements should I take to decide what remedial work 
should be done to place this action in a better relationship to the 
strings.  Indeed, what are the proper dimensions of Steinway hammers 
(maybe someone hacked these down too much) and usual bore distances?

Andrew Anderson