Think it is time to replace the rear discs and pads on my 2004 A3 2.0 TDi as I am getting a creaking/squeaking when breaking at low speeds. I have read in a few posts that people suggest getting a piston rewind tool, I am having trouble finding one on the internet. Can anyone recommend somewhere to purchase one of these tools at a reasonable price ? Will the same tool work for the front calipers as well ? Is it quite a simple job to replace discs and pads on the rear as have only done fronts before, does the handbrake cause a problem ? thanks in advance.