X2 or X pro setup for grass

[ben44]

Dear all,

I have a national race the 14&15 / 05.
The track was in grass, i never drive on grass and i would like to have a good start setup.
I can use the big bore, or the normal one.
On the big bore my piston are at 1.2 Mm (I just have he spring sell with them but i would buy the other quikly) I can change them if you prefert 1.4 mm on the rear (because i thinks is better on grass), on the normal one i have all the kyosho piston too with all the ansmann spring + light yellow front and rear kyosho and sliver front kyosho.
For the car i thinks have all the option

Please help me

Ben