[pianotech] weights of hammers and shanks/replacement parts

[KeyKat88 at aol.com]

Greetings,
 
                 This is the first Steinway that I am replacing hammers on. 
I would like to just replace what is there. The keys have 4 to 5 lead 
weights in the bass. I don't think I should change it. 
 
       What are the pros and cons of just replacing parts that are there vs 
removing key weights and changing ratios and weights?   
 
       Is there any reading I can do to help me through this job? I have 
replaced hammers and regulated before...on uprights, and pianos like Lester 
grands, but I have never done a Steinway and the whole weight figuring before.
 
         When replacing hammers and shank/flange assemblies, does the 
weight of the shanks along with the hammer weight affect 
downweights/upweights...or is only the hammer weight alone a factor for regulation?
 
Thank You,
Julia Gottshall
Reading, PA      
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