My previous car was an audi A3 quattro with Haldex Differential. I added an HPA Motor SPorts Haldex controller to it and vastly improved my performance!

Haldex Performance Controllers | HPA Motorsports, Inc.

Is there anything like this for the ATTESSA-ets? Don't get me wrong, for the driving I do, in the area I live the existing setup works fine (I love thats it's rear-wheel biased!) but I've been spoiled by having a bit more control in my other car.

thanks in advance for any help/advice

 

Interesting! I've not seen anybody use a similar upgrade on the G.

 

I haven't seen anything like this for the Attesa.

 

Yes, It's called a GT-R!

 

I found this ...not sure if it's compatible or not for sure:

ETS-Pro Center Differential Torque Split Controller for R32 R33 R34 Nissan Skyline GT-R - Full-Race.com