looking through Modeller's generated output:

> % sequence identity : 8.397000 > Sequence length : 131 > Compactness : 0.393804 > Native energy (pair) : 26.327664 > Native energy (surface) : -0.742166 > Native energy (combined) : 0.798566 > Z score (pair) : -2.285661 > Z score (surface) : -2.854515 > Z score (combined) : -3.209596 > GA341 score : 0.040909

i'm now guessing it is probably the compactness,native energy and Z scores?