Hey TaNg, I've been researching AN lately, may I ask a question/suggestion? Please bear in mind that I have no experience whatsoever with AN !! I could have this wrong.
But from what I've gathered, you'd find more benefit from Sensi Carboload right now. Its essentially molasses for weight gain. AN Overdrive opens the gates for the plant to feed better and more, but by itself it wont do much. I could be wrong, again, this is what I have gatered by reading, not experimenting. It seems to me that Overdrive really kicks the plant into turbo-hazardous-munchy-mode (hence to be used the last 2 weeks). But if there are no sugar to munch on, if won't do much. It should start eating away on its reserves faster though. But for some serious bud-boost, my guess would be Carboload. What do you think?