*** do_average_coords(): *DIFFERENT* model 5 Res HIS27 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 16 Res HIS27 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 18 Res HIS27 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 20 Res HIS27 Atom  HE2 
 *** do_average_coords(): Expect wrong values