I run a T3 here in Sydney also.
I swear by the 2.0m chassis with the standard top deck, I have persevered with the thick and tried to get it going as well as I like the thin, but couldn't I am back to the thin and extremely happy.
In saying that it appears to be personal preference, as some of the guys have done just as well with the standard chassis.
Might be also worth Noting Lemieux ran the thin chassis and thick top deck at last weekends pre worlds. He is also a big fan of the thin thick combo.
Best of luck
Nathan
Cheers mate, parts on order..