<html> <body> Hi Gordon,                      Sounds as if you have growing action brackets.   Contact Young Chang about Warranty replacement. Good luck. Regards Roger At 05:13 PM 7/1/2005, you wrote: <blockquote type=cite class=cite cite="">I have been tuning a mid-sized Young Chang grand for a serious client for several years now. Each time I go to tune it I find the hammers blocking at the strings. I'll turn down the let-off dowels to some degree of let-off to get me through the tuning. But each year I go back to her house the condition is the same, the hammers are blocking again.  I want to regulate this piano as it should be but I am concerned that I will be frustrated by whatever it is that causes the return of this blocking condition. Does this sound familiar to anyone? Could this be a loose let-off rail? I have marked the capstans to see if they were turning on their own and they don't appear to be. __________________________________________________ Do You Yahoo!? Tired of spam?  Yahoo! Mail has the best spam protection around <a href="http://mail.yahoo.com/" eudora="autourl"> http://mail.yahoo.com</a> _______________________________________________ pianotech list info: <a href="https://www.moypiano.com/resources/#archives" eudora="autourl"> https://www.moypiano.com/resources/#archives</a></blockquote> </body> </html>