Sostenuto Puzzler

[A440A@aol.com]

Time to ask a few questions: 
   On this clacking sostenuto,  is this a worn part, or is the answer totally
in adjustment?  Also, will the sos. cam stay held up by the damper pedal if
there are no notes played?  If so, it is like Del said, the monkey spring is
not strong enough to overcome all the tabs on the underlevers.   
   If not, then we need another clue.... 
Is this a worn part, or is the answer totally in adjustment?
Still wondering, 
Ed Foote