*** do_average_coords(): *DIFFERENT* model 4 Res HIS19 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 12 Res HIS19 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 15 Res HIS19 Atom  HE2 
 *** do_average_coords(): *DIFFERENT* model 17 Res HIS19 Atom  HE2 
 *** do_average_coords(): Expect wrong values