Thanks Hexonxonx, maybe the improved weight will indeed allow me to get almost the same flight times. I checked fmadirect and the do have a 3270mah, but it's only 3C!! Actually, I found some Polyquest Lipo's at aircraft-world.com that will give me a 12oz weight saving, and be 4400mah - these are 2200mah cells which I would make up as 5s2p, and they have a 10C continuous rating.