Well I took the plundge and bought the b400 after reading some favorable reviews. Being that this is my second helicopter but first with real capability of a cp system, I was wondering a couple of things and was hoping some of you all could help. 1st. What batteries and chargers do you all recommend. And 2nd. Talk to me about upgrade on servos. This is one of the things they talked about in the reviews that the stock servos don't center well. Anyway if you all could help that would be great.