Run without the body on at first so you can visually monitor the packs are you go, if they are mad they'll start a puffin'.
Hobby City
http://www.hobbycity.com/hobbycity/s...2&v=&sortlist=
is the hook up for inexpensive semi qaulity packs, I have a dozen and haven't ben let down yet. If you want a higher qaulity pack check with Mike/RCM, he almost always have good prices in NEU or eqivilent packs..