Hi Grant, yes Gt3 anti-sway bar on Front (Rear doesn't fit) made a huge difference. I have the Tarett rear one.
I defeat traction control by holding it down for 3 seconds and turning it off. The car is so much more stable without T/C constantly and unnecessarily butting in.
You really don't understand how much Traction control was destabilising the car, until you switch it off and you have pure silence. Its as if the car was always nervous and on the edge. Now its so quiet and predictable. The feedback is pure and not clouded. When the car does start to slide, its a very small correction and all good again.
I have never spun the car with t/c off. It would just bite a heap of rear pad all the time, and spit you back the other way. The T/C on our cars is nothing like on the GT's. Ours is rubbish. Switch it OFF.
Regards MJ.