For what it's worth, I've got an AirDog 150 going on next week. I've been logging WOT runs on PPE Hot+2 level 6 and can't hold rail pressure. Drops to 10K-13K. I know I've probably got HPRV issues, also. But I'll do some empirical testing and log after the pump, then after the new RV work, and then if necessary after a new PPE pick up, and post results.