Just got finished adding battery and switches. The hatch shown underneath the fuse is where the final battery, a 4.8 V 3600mAh , will go the balance the plane. It will power the ignition for the radial. The other batteries (2 for receiver w/ 2 switches, and 1 for the APS 380 fuel pump) are mounted directly under the cockpit. All balances well with this setup.
