hammer return spring string

[Tuneyourpianonow at aol.com]

I have a customer with a nice Yamaha M2 console. The hammer return spring  
strings are all rotten.
Do I replace all the strings? My first choice. Or, do I replace the butt  
flange assy. (flange, spring, string)?
Doing that I will probably have to travel the flanges. My guess at  time 
would be longer to do the strings alone. All the bushings are moving well.  No 
verdigris.
Any suggestions? Am I looking at 4 to 6 hours or more? How much does a  job 
like this run?
Thanks 
Steve Kessler
 



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