the cheap britpart calipers are just fine. weigh up the cost and time. by the time you have had the old calipers shot blasted , got new seals and pistons etc, its far more than the 35 quid calipers. as for stainless pistons , is it worth it. if the new calipers last 5 years before you bin them then its still cheap. ? mind you, britpart do stainless pistons now, dont they ??