So, I picked up my MP-05 from the display shelf yesterday, and the light feature of his fusion cannon wasn't working. I was a bit surprised, since I hadn't used the feature much, but I figured the factory batteries must have been faulty or something. I bought a new set of batteries today, and it's still not working. Is there a safe way to take the fusion cannon apart so I can check if there's a loose contact or something? I'd like to reiterate the point that he's been on display the whole time, with his light off, and I only used it a couple of times anyway.