I bought a PV2+ a couple of months ago and I have had the urge to build a F450. I've been ordering all the parts ( Frame, NAZA M V.2, PMU, Led, GPS, E300 System, Turnigy9X) and now I'm ready to order batteries and a charger. My head is swimming with all the battery/charger choices. I would appreciate some guidance from those who know. Thanks in advance.