You will not be disspointed with turnigy packs, i have zippy, turnigy, enerlands, hyperions, thunder power and i have to say that the turnigys are about the best there are. I havent looked at the soldering tho. I honestly think tho that my 4s1p 5000mAh 25 turnigy is as good if not better then the 40c thunder power of the same spec. Enjoy. I also have thos servos, they are a beast. I just wish there were more servos that had the upper part aluminum as well as the bottom, like the high voltage JRs out there. Its so much easier to not have to worry about the plastics part of the servo getting broke or bent.
Like this:
