hi, I have recently bought 335x32mm rotors which I need to make som bells for. The car is a sapphire cosworth 4x4, so my question is if the bell should be just plain flat on both sides ? and how thick should it be ? My wheels have an ET33, would really be nice to have bells made without needing an spacer afterwards or having to roll the arches. Hopefully somebody has somewhere the same rotors as me and can give me some pointers