I am using flat packs.. I can see where square would be a problem with what I suggest. Consider those 1400 mah's in flat pack... mine were under $25.00 at a local hobby store, on the Internet you could likely beat that price. Sharing would be tough with my idea. I did fly this plane nose heavy and as one of the other responders noted it flew OK. When doing that I only filled it 3/4 full of fuel to "sort of" off set the noise heavy status.