<HTML>Thanks to those who gave some advice. The problem is in the agraff section of the trichords. I discovered that the= problem was not so much string leveling, but string spacing, as Mary sugges= ted. But instead of working with the dampers, I put a screw driver between t= he agraff of the adjacent string and the right string that was ringing, and = twisted the screw driver. This brought the right string closer to the middle= . That solved the problem. It is still a mystery why the right string kept ringing only with the shift = engaged. During normal playing all three strings are activated by the hammer= . And with the shift only the middle and right strings ring. So why is only = the right string ringing? Wim </HTML>