Thanks for your comments Peter, I am enjoying the ADS-B setup already, and had a look at MyLogs this morning. If I can source some LMR400, I think that should complete a very nice ground station.
I have a clear outlook out to the North and out over the Pacific to the East, there is a tree line to the South that appears to reduce the signal somewhat, and not bad to the West, I will see what the afternoon departures to Asia and Europe do to the western plot.
I have seen departures from YSSY pop up at 1000ft, but no Lat/Long until around 2000ft.
This mornings Polar plot has grown quite nicely.