right basically my drivers side rear caliper i presume the piston isnt retracting so it has basically pushed my brake pads to death and then has scratched the rear disc , it has around 5/6 lines all the way around the disc , not very deep just a little scratch , as soon as i heard the car scraping ive stopped driving it , i dont really fancy buying new discs as there expensive and these ones arnt very old. my plan was to buy another yes ANOTHER (third now) caliper and some new pads and just use them , will this be ok ? or am i guna have to spend out again ! my poor td04 is never guna get done at this rate