Try going back to the 4 degree C-hubs and swap the springs around to silver on the front and gold on the back. Or you could remove some of the spacers on the inner front camber link, this roll centre change will give the front end more grip. Remove the front roll bar. Swap the 2.5degree and 3.0degree pivot blocks from the back to the front. TBH though the standard Pro4 setup did not understeer for me, maybe you should think about trying different tyres first?? Jonathan