hi can anybody give me information how to change the rear calipers, as the n/s/r caliper is not releasing the handbrake cable out,and i need to sort this out for the mot. i have put wd40 0n the caliper and tried to push the cable mechanism back out and it does this ,i pull the handbrake back up and the cable goes back in then release handbrake and cable mechanism just stays in the same place.so i need a how to guide to change calipers if anybody can help, cheers paul