Posted for "Matt Hapgood" <matt.hapgood@alumni.duke.edu>:

 Bruce,
 
 They blame the "unknown" factors.  They don't know the mixture, timing or
 power that was used to break in the engine.  I understand their concern.
 However, I'm frustrated because they don't know the mixture or power used
 for ANY engine they overhaul that is broken in by the customer.
 
 They are frustrated, as am I.  The shop is Triad Aviation.
 
 Matt