Thanks for that last explanation. What you said about the model built especially for SAS made perfect sense. However, what wasn't clear was what JRA stated about "Perentie". I had understood that "Perentie" refered to the SAS model outside the other models. Still, I love that beastie and in my game it will see action with all kinds of SAS (not only Australians).
Obviously I misunderstood them.