New to the CRT.5 have some questions

[Snipin_Willy]

Update to my CRT.5:
I haven't been working on it much the past few months as I've had my RC8T to build and race. It definitely stole the spotlight.
Recently I've been putting in a few hours here and there working on the mini again to work out a few kinks and iron out the wrinkles. After much thought I'm dropping the A123's because of their awkward size and power density for the space they take up. I'll keep the packs around to test setups, but other than that I'm out of A123's until they make a flat pack and label it as their own (I don't trust MA LiFe).
That being said, I'm investing in a couple of HC lipo's. Anyone think 4s on a 1509 1.5Y is a little much? I'm gonna shoot for the moon, maybe I'll beat NASA there!