Steinway hammer alignment

[A440A@AOL.COM]

 oleg writes:

<<Beside, the normal place for hammers of the Steinway is slightly to the

left, allowing for a more quick left pedal (una corda) effect, while

protecting the hammers to go to far on the left if the piano stay a long

time on his side. >>

I believe that this is the Hamburg style, but the New York Steinways are 
supposed to have the hammer meeting the string with more felt on the treble 
side.  This allows the una corda to actually function as a ,umm,  well, a duo 
corda.... 
   I also don't understand why adding a strip of sandpaper, felt, or whatever 
to the rail, is supposed to move the hammers to the right. This would affect 
all sides of the flange equally, no?  
   And it is far faster to use two pieces of brown paper tape to space a 
hammer sideways,(without changing its travel), than it would be to enlarge 
the hole and deal with the resultant changes in traveling.  If you need to 
space 60 flanges, count on an hour's time.  You will also need to reshape the 
hammers, so add that time,too. 
   How centered are the drop screws hitting their leather pads? 
Ed Foote RPT