*** do_average_coords(): *DIFFERENT* model 3 Res HIS3 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 6 Res HIS3 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 7 Res HIS3 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 8 Res HIS3 Atom  HE2 
 *** do_average_coords(): Expect wrong values