I didn’t have to think about where the rotors came from either. I just like to know because if DoctorDiff stops selling a certain kit I want to be able to support pad and rotor changes down the road.
I think this is huge. Kits come and go, and if I plan to drive my car I don't want something exotic I have to struggle to replace. Unmodified parts make it so much more likely that I can find what I need if I need new ones.