i just brought a diatech anchor rear hydrolic disc brake from my mate, it was working fine when i took his identiti out for a ride but when i got it on my kona, there was a big puddle of hydrolic liquid on the floor and i think it was leaking from the caliper. i took it to the shop 'billys' in cambridge which are pretty good and he thought my pistons are gone, he would charge me 3 or 4 pound for the kit but i would have to strip the hole brake down and it would cost 25 pound an hour for them to do it and would take roughly an hour and a half which is bad, i might aswell buy a new brake because you can get the diatech anchor for 65 pounds anyone know what it is? is it the pistons? and any ideas on a new good hydrolic disk brake. i was thinking about juicy seven?