Airways is more complicated than Airservices.
At Airways you start with a base salary which increases every year for about 20 odd years. Then you ad a loading based on the area you work in.
Band A - Regional tower
Band B - International tower and Area Radar
Band C - Oceanic
Band D - Terminal Radar
Then you ad a roster specific salary component based on how many hours your roster requires outside Monday to Friday 9-5.