I don't think there is a special tool, never heard of one anyways. I believe the HD Digital Tech. makes the ABS hydraulic unit pulse to cycle the air out of it. You may be able to do that by bleeding regularly, then go do a few panic stops, if you are comfortable with that. I replaced the hydraulic unit for a friend then bled regular style. He had brakes but I had him go to HD for the Digital Tech part.
tourbox