Could anyone help me. Im trying to change the brake discs on my porsche boxster. After following all the instructions off a website ive got down to taking the discs off...unfortunatly they wont come of as easy as it says they should. Ive removed all the screws but it feels like the disc is attached to a spring because when im trying to take it off its just bouncing back to its original position...anyone know what i need to do?