I am wanting to swap out the stock rotors and pads for a set of cross drilled and slotted rotors and ebc green stuff 600 series pads. The problem is I can't get the old rotors off! I have unbolted the calipers and removed them and placed them on the leaf spring. Undid the parking break cable off both sides to relieve the PB and beat all around the rotor with a hammer and the rotors are not budging! Any help would be great.