An easy way to move the battery aft in the radio compartment is to simply stick it (flat pack) to the wing as far aft as possible. I've done it to both my Aresti and Magic. There is enough clearance above / below the servos. With the Magic I servo taped it to the top of the wing and added a rubber band and hook loop set up. ( Go to the Photo Gallery and search on my user name to see pics). On the Aresti I opted for the even simpler method. Zap-Goo'd it to the top of the wing! Goo remains relatively pliable and cushions against vibration. And it will peel off with a little effort, in case your plane outlasts the battery, or vise-versa. So far so good!