Definitely get the 6Oxo to help you keep the gains. About 3 months ago, I stacked Cellucor P-6 and 1-AD. I got f*cking great gains (something like 30 lbs in a month on my bench and even more on squat), but as soon as I quit, I lost all of it in the same timeframe. No side effects (hell, I've already got the gyno), just lost gains. So get the 6 Oxo.