KC setup advice needed - carpet

[bish]

I need some carpet setup advice, I started with the kit setup for carpet and made some minor tweaks (front and rear roll bars), lighter diff oil.

Thing is, it's traction rolling mid corner. If i go easy, it's fine, plenty of steering in the sharp corners at lower speed, but that's not fast lapping! I tried adjusting the roll centre to prevent chassis roll, still traction rolls. Maybe the car is too 'locked' in and i need the back end to be more loose?
I'll upload the setup sheet when i'm on a computer that'll allow it.

Chassis is carbon, position 3
Front - yellow springs, 45wt, no internal limiters. 1.2mm roll bar, short upper link with 1mm spacer
Rear - Green springs, 35wt, no internal limiters. 1.1mm roll bar, long upper link, 2mm spacer
Ride height 15mm
Camber -1 all round

Question is, should i just copy the Orlowski Trencin setup for carpet? It's not like he was driving a badly setup car is it?!

Thanks in advance.