I’ve got the OS3 up here in Brisbane. I’m still playing with settings, but recently switch to manual rain days rather than ETo purely because current conditions mean I was generally stuck at 133% to 199% ater level. And that just used too much (i.e. emptied my tanks).
Out of interest, have any Aussie-based users identified a source for not-insanely-expensive 2-wire flow meter for the OS here?