Ok I have something for u. I went and did this with 32 gtr brakes. Removed the bit in the caliper drilled and taped to the s1 14mm bolt. Got it all fitted up bleed it and no pedal. Had a swoosh sound when the pedal was pressed. It would get some pressure when u pumped it a few times and the car would stop. But as soon as u let it off nothing again. Went to a shop they bleed 1L though the system with no change. Then got the master and booster cheaked out all working fine. After the front lines where clamped off there was a nice pedal. So I replacing all the stock bits so I have a car again. My question is do u think the calipers need a rebuild or bigger lines?