[CAUT] Andres punching tested

[Erwinspiano@aol.com]

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List
  While putting the final hours on a newly  bellied D I did an experiment.
   I had installed the usual Thick green  punching a while back  prior to 
receiving the New Oorebeck front rail  punching's. So I listened to the sound of 
F-4 carefully, checked the dip , then  changed to the new ones, checked the 
dip , played the note & the  sound suddenly came together with more power and 
clarity than the first  punching. The solidity under my finger was firm and sure.
    Thinking it to be an  anomally I changed back to the green ones. The 
Sound diminsihed &  lacked focus. Well ,I did this a bout three times on the same 
note with the same  result. I then checked a bass note f-1 with the same  
effect. 
   I'd say the new  puncing  has a similar beneficial yet cumulative effect 
much like  to mating & hammers to & leveling strings
  I placed the green punching between two  pieces of thin maple & put a 
calipers on each side. The compression with  modest force would change easily as 
much as .030. The white new punching  only .010.
   Considering all this, since the  key is where the power is generated  it 
needs to have a precise stopping  moment. If not after touch can change to a 
depth of .420 even with an initial  dip setting of .390 .(which is my preferred 
dip in Steinways whenever possible.) 
  Think of the distance in excessive jack travel  especially on parts with a 
narrow window for jack movement & also it's  effect on slowing repitition 
performance. With the white punchings a far  more dependable dip /touch can be 
assured.
  Think of the improvement in SOUND  Baby!!!!!!!!
  I  noticed no change in noise even  though this is a pressed felt & not 
woven.
 I immediately changed the entire set &  tomorrow or Friday I'll have a 
chance to hear & feel  the whole  piano.
  Regards
  Dale  Erwin

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