I'm sure someone with a better knowledge of the timetable will correct me (this is no bad thing), but I believe that all trains are rostered in the SWTT as Hunter sets. The Endeavour sets are used on an as required basis, cycling through as if they were Hunter sets. I recall reading a few years ago when the Hunters were introduced that residents on the Telarah - Dungog and Maitland - Scone sections requested specifically that Endeavours be used on their services, due to the lower height of platforms and the step-less Hunter cars making it difficult for elderly passengers (among others) to board the trains. That being said, be it that this is no longer the case, or that set availability was not suitable, I've shot an even mix of Hunter and Endeavour sets on these long distance services. In some regards, the Hunters are preferable to the Endeavours, better pickup and braking, and more security features for crew and passengers.