My plane came out balanced just fine with the following setup.
1. I used stock elevator servo location and ran two fiberglass pushrods straight back to the rear. required no bending or extra hole cutting.
2. I mounted the ignition battery just inside the firewall against the fuselage side. Plenty of room.
3. the Ignition module is mounted on the firewall right next to the engine mount.
4. You must reinforce the aileron servo tray glue and put extra epoxy all around the landing gear mounting plate area.
5. This plane looks really sharp if you also paint the landing gear white.
6. the Receiver is mounted behind the servo tray and the eceiver Battery is mounted behind the fuel tank.