radio interference, flying wires, wing rigging.
The thing you MUST NOT do with metal flying wires is to allow a "loop" to be established. For example: A wire, starting above the wing at the fusalage, going out to a point on the wing, then through the wing, back through the gear, etc, etc all the way around and back up to the fusalage and connecting to the wire you started out with. That would be a loop and it will cause you no end of problems. If you need your plane to be so rigged, use nylon or some other non conducting material to "Break" the loop some where.
Bish
K7QCP