Spent 2 hr to take out the rotor screw and no success. Also found the grooved rotor already made my new brake pad grooved and the other rotor also has some slightly uneven surface.
Now if I replace the rotor and without replacing the new pad, will they smooth each other or damaged pad will damage new rotor?
If pad will damage new rotor, given I don't have any shaking braking yet, I might sit on it for a year then replace them altogether. Appreciate the help to answer first-time home mechanics's question.