You will be getting good at building aero bits Glenn!
 
How did you establish the height of the rear spoiler i.e. high enough into the airflow?

The spoiler is the same $50 one that I bought years ago. It's probably OK though may need to be higher. 
I don't want to make too many changes in one hit, or I will be chasing my tail. 
If I find that I have too much front traction compared to the rear, I'll look at getting a different wing and/or adding a diffuser.

Here's the latest video of the car from the Nulon Nationals Time Attack at Sydney Motor Sport Park.



https://m.youtube.com/watch?v=LdvoE8VUq10

I did the Brabham circuit yesterday. The car went very well and got a 2.12.5 lap
Here's the video - 

https://www.youtube.com/watch?v=ZNyCdvJGgOA

Nice driving Glenn, that Civic was hella quick! Quick question - love the sound of your BOV (or lack thereof?), whats your set up?

I'm sure it's been answered earlier but I'll have to scan through the whole build thread some other time haha

It's just a regular HKS BOV. 
 

 
 

How do you compare the Brabham to the GP circuit? 
It was good to see the car moving around when chasing the Honda!

I prefer the Brabham. It's harder to get right.

It certainly has that technical aspect to it. So many corners to get right in that section.

Here's some of my latest handiwork. This is an attempt to make the car a little bit quieter for Wakefield Park and hopefully not trip the noise meter this time.
Making exhaust pipes is much easier than I thought!