*** do_average_coords(): *DIFFERENT* model 2 Res HIS61 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 3 Res HIS61 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 4 Res HIS61 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 5 Res HIS61 Atom  HE2 
 *** do_average_coords(): Expect wrong values