Le ping. Thanks for saying the sectors are based on workload. Could you contact Mr Skidmore and explain this to him. He and others think it reflects VHF coverage of the ground station. Under NAS we suggested monitoring the nearest VHF outlet if communication to ATC was required. All the " workload designed" frequency boundaries were put back on the charts and even at 8500' there are many places where there is no radio coverage to a ground station on the now required frequency. Crazy. Just trying to return to the 1950s! Same re Launceston. Get a rational brain is my suggestion.