Sorry for digging this one up, but I found out that pistons were fitted quite randomly on my gtv6, the result is uneven pad wear (slanted) and I guess poorer braking performance. Anyway since pistons are in horisontal relation to the disc, then wchich positon is correct? I would guess the lower one, but on 105 cars which have similar system the piston is supposed to be rotated 22 degrees against the rotor. That got me a bit confused