As mentioned if your electrics are small enough you can fit the esc, receiver and PT inside the rear of the chassis. Then you can drill a hole just behind the servo and one next to the motor and run the wires inside the chassis. This way its looks nice and neat, plus keeps the weight down low and everything nicely protected from damage.
Pic of my m03, sorry about the very poor quality but you get the idea.
http://img.photobucket.com/albums/v7...6/SDC11320.jpg