Zen didn't do that stuff Kefeck, He didn't do it perfectly ( his words ), and he did it what 11 months ago?
I did stockpile 1600 BA, no I most certainly didn't do up to snuff(fist NCB evar!), and yeah about that much time and I finished at 4.3 Mil MPR.
If I did it now with the same elements I had then I'm quite sure I could make it to 5.6 - 5.8 Mil MPR. If DoS did it with the same elements I had then I'm quite confident that 6Mil MPR+ would be reached with no fuss.