Columbo:

You know, you may have something there. I leave my aileron leads lose also, but of course they are no where near the ignition battery and of course don't flop around all that much. When you took off and did a half rolling circle and the wires moved, bang, you got the interference. Could have very well been the case. Well, we tend to all learn lessons the hard way. Some harder than others. As in one of my previous posts, I learned the hard way about vibration. A place where I didn't expect it, but none the less happened. But I'll make sure it doesn't happen again. These lessons get too damn expensive! :-)