I ran my Eibach ARB's at Spa for the first time a few weeks ago. Softest of the 2 settings on the front and the 2nd softest of 5 settings on the rear. Definitely much less understeer and far more stable but next time I am on track I will try a stiffer setting on rear to see if that neutralises the understeer further. Those are the settings Litchfield suggested and it worked well but it's all a but trial and error at the moment as more track time is needed to find best set up. Interesrted to hear from others running the Eibach's.