I replaced my rotors and pads on my Scion tC. Went with Brembo plain rotos, and Axxis Ultimate performance pads. So far I haven't felt any problems with this new set up, but one of the Brembo rotors did have a couple small nicks on the rotor surface. Looked more like casting flaws, about .05 inches in depth. Would those small nicks cause problems like cracking. Should I replace the rotor? Thanks.