HI PAUL ,YES YOU CAN MOVE YOUR BATTERY FORWARD BEHIND FIREWALL AND WOULD RECOMMEND USING A SECOND BATTERY TO BACK UP YOUR PRIMARY BATTERY IF YOU ARE USING A RETRACT SERVO (IF RETRACT RODS ARE NOT SET RIGHT,THE SERVO WILL IDLE CAUSING A DRAIN ON BATTERY)SO THIS ALSO HELPS WITH NOSE WEIGHT. JUST GOOD INSURANCE! IF YOU DECIDE TO USE A SECOND BAT YOU WILL ALSO NEED A SECOND SWITCH!