rookie question; Setting bLow distance

[KeyKat88 at aol.com]

Greetings, 

       Reading Reblitz's book, his step #8 to reguating a vertical states to 
shim up the hammer rest rail to the correct blow distance. My question is, if 
this is done then arent you tampering with/advancing the stroke and infringing 
upon the room/space in which the parts need to cycle? Seems to me, if a piano 
is an old upright, wouldnt it be wise to first at least replace the felt 
front and balance rail punchings, before you go ahead and set the stroKe??

Julia Gottshall
Reading, PA
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