I have a Tiger Moth, and it's definitely a lot of fun. What I did was bought a bunch of Lithium batteries for it. Theres a deal from Hackett Electronics where you can get 8 packs and 2 chargers for $60. One pack is enough to fly the Moth for about 30+ minutes at full throttle. They're also lighter than a 7 cell NiMh pack, and if you do the math, alot cheaper. There a neat instrument panel you can print out and paste in the cockpit from that Tiger Moth squadron web page as well. It's a nice touch.