As above - my HPK's on the front of the Zed rotted away round the pistons. On advice from here i junked the calipers (instead of selling them) and possibly being responsible for an accident!!....anyway when i stripped them i removed all the pistons and seals (all oem) and all fine....couple of tiny marks but nothing deep enough to break seals and leak....when i went looking for pistons i almost fell of my chair on the price of oem stuff....so 50 quid for the lot...pistons, seals, dust seals and pad retainers.
