My calipers are in the correct position ( bleeder up). I have bled the system using a hand vacuum pump and also with the pedal. The system has the symptom of trapped air but I have bled about 3/4" the M/C volume from each wheel when I bleed. I would think this would be enough to get the air out. I can try a pressure bleeder but I am wondering if not running a front residualy pressure valve could cause this symptom.

I checked the proporting valve using a test light on the brake plug and it didn't light up so I must assume the piston is still centered.