fox222,
I'm using a poly 4 charger with 4 Hextronik balancers,I charge four at a time and with the balancers they all get balance charged. I do see the point about running the motors. I am leaning to the Herricane 550 its designed to run on 2 3 s packs. Its a bit smaller than the Trex 600 but I coould strach my current equipment out for another year and wait for battery prices to come down a bit mmore before making the jump up to the larger packs. i do think your right about the 600. I also need to upgrade my radio equipment, my dx6 wont cut it for a larger heli. []