I just did this, to replace my batteries. I should say I have a Attacker II. When in there I re-soldered my contacts on my charging port. One was so loose when I wiggled it it came off. Make sure to check those connections. Just remove the 5-6 screws, I removed the green tape and replaced later. Once screws are out disconnect battery wires (take note of what side they came off of) and you can work with just the top of cover. Very easy. Good luck