well i got 3 7 cell battery packs, (for cars) i will probobly have about 60-90$ to spend after the 240$ for the corona motor package, and thing you'd suggest? would a gym be a big enough to do some slow flying? like you know, hovering and learning? and is the corona pretty easy to fly? i can hover the hummingbird a little, and from what i hear if u can hover one of those you can hover anything, thanks