I've been downing NoX before lifting for about a week now....and I get pumps so fierce they fucking hurt. Am I overdoing it? Or is this the pain barrier everyone talks about? Who else has tried this stuff and how did it work for you. I'm inclined to say I like it and think it's doing it's job as I can visually see the difference when using it. And to anyone else who does use this, do you use the rest of the "Mass Stack", Nitrix and CellMass?