Awesome work mate!
I plan to do one of these one day too, there's not enough Aussie stuff out there and I'm keen to try to have at least one shelf of Aus armour...Other than the ASLAV from Trumpeter I don't know of many kits available.
Could I ask what kit you used, and if were there any AM additions?
It looks like the Tamiya kit?
Also you say this is your first armour build - Do you mean to say you've done other (non-armour) kits or this is your first ever kit?
Either way it's brilliant work, but if this is your first ever kit...well then I clearly haven't put enough time into my kits because they look nowhere near as good!