Yes it may not work on a ELC outlet. It didn't here for me in the US, it kept triggering it. When I talked to Tormach about it they told me it was the spindle drive that was triggering it. But it may depend on the sensitivity of your ELC so you may not have a problem with in Australia. By the way, I agree with all Philbur said. I myself do not use coolant at all on mine. The only problem is that you need a way to blow the chips away, especially with aluminum. You can use compressed air, it works well. You can even use a simple solenoid valve to control the air blast with your gcode:
MillIMods
You should like the 770 very much. The only possible limitation I see is the size, in case you need to make large part or you need to make fixture to make several small one at a time. I am myself very happy with my machine.
Christian