Here is what I have: 4 wheel disc system, Baer four piston calipers on the front and Baer Iron Sport single piston calipers on the rear. The master cylinder is from Master Power Brakes and is installed using a MPB combination valve, both items were spec’d by MPB using the brake system components mentioned above. The system is plumbed using 3/16 NiCopp line, the rear brakes are supplied by a single line split with a T mounted near the rear end housing. The flex lines from the frame to the calipers are braided hose that was supplied with the calipers directly from Baer. The pedal system is factory stock for this vehicle (‘64 Comet), the rod from the pedal to the master cylinder is adjusted correctly. Every fitting is sealed, no leaks anywhere. The problem is that after bleeding the system using a pressure bleeder, a vacuum bleeder, and the old fashioned pedal pumping method I still has a soft pedal for the first few pumps. I have gone through the trouble shooting guide on the Master Power Brakes web site, and have come to the conclusion that there is still air trapped in the system. They claim that is the most common problem with the symptoms I am experiencing. I figured the power bleeder would push the air through, but it has not. I pumped the pressure to 25psi on the tank hoping it would do the trick but no luck. I am open to ideas. Thanks!