Does anyone know if the strength of a brake master cylinder can be adjusted. I have done a seira rear disc conversion on my mk4 escort cabbie and just cant get the brakes right, after endless times of bleeding the system they are still crap. The servo and breake master cylinder are new, the sevo is a genuine ford part but the master cylinder a pattern part. I was told the cylinder may need adjusting to suit the setup. apparently there is a screw inside the flange where the cylinder ataches to the sevo.Has anyone herd of this?