mx5cartalk.com

If you haven't already, have a look at this thread:
viewtopic.php?f=81&t=34493
Then perhaps take a look at the relevant threads this year in:
viewforum.php?f=81
That'll bring you reasonably upto date with SC'ing in Aust.

If I were you Mazfan I would get on out to the RAC driver Training centre on Sunday morning and talk to the guys from the MX5 club of WA running their 3rd Autotest.
There will be guys with turbos there and a wealth of knowledge.
If your not a member of the club come along and see what's happening, you might want to join the club and join in on the fun.
Cheers.