I also wanted to mention that as far as batteries go...IMO them stock Nicd Batteries that come with your Radio system are fine. They can go bad, but so can other types as well. I use mostly Nimh batteries anymore, but I never had much trouble with them stock packs either when I used them. My rule of thumb was three flights, and put them on the quick charger. I never had any problems using that system.

The absolute most important thing to remember about working on RC Planes is that its alot like love making. Everybody has there own technique and everybody thinks they are the best at it.