I have the CRC axles on the car. The CRC front rims are a pain to put on with the C-clips. I will try narrowing the rear. I'll also try some heavier grease in damper discs, combined with some more traction compound up front. This might help, altough I'm afraid I will need to use more throttle to keep the speed up in the corners (run time, run time, run time).
I will experiment with all of your suggestions next sunday.
Thanks for the advice guys!