Ronsens a possibility on a Kawai RX??

[Piannaman@aol.com]

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I work on  many Kawai pianos, most of them 5 years old or less.   Many of 
them are RX series pianos.  I like the soft voice they have when  new.  
 
Though the hammers are heat pressed, they are voiced down quite a bit at  the 
factory.  However, after a few years (or less, depending on the  player), 
they become hard and brittle sounding.  They can be voiced again  and again, but 
when they need replacement--which will be soon on at least one of  them--I was 
considering the possibility of the Ronsen AA Wurzen felt  hammers.  It seems 
logical to me, based on what I've heard of  these hammers and based on the 
sounds I like to hear coming from RX series  grands.
 
Has anybody tried these or alternative hammers on Kawai grands?  
 
Am I way off the mark?
 
Are the Shigeru hammers cold pressed, and might they not be a good--and  
probably expensive--replacement also?
 
Just wondering,
 
Dave Stahl

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