This is our second go around with installing intrnal blue lights in protoform Optimus Prime movie figure. It's quite a procedure indeed. Tiny watch batteries hide descreetly where his head use to fold into, and his head (s) are now removable, and retooled with clear acrylic posts to alows the light from the LEDS, to travel up through them. This figure has three three exchangable heads: G1 Megatron, Classic Nemesis Prime, and Protoform Nemesis Prime. We've included differen't exchangable accessories for each mode. He still transforms into vehical mode, but because of the added torso lengeth, the top piece dose'nt fold down quite a flush. This was only a visual problem, so we fixed it by adding a removable metal grill, and a fire ball entry shield (not pictured, but the same as our first protform). We gave him a mini war chest to store all his heads when not in use, and a large crate to hold all of his attachments. Nemesis primes sword hand form, cannon hand form, ect, ect, all work on a ball and socket system, to allow articulation. We also gave him a exchangable pair of cartoony "anime style" hands, a feet. Our end result here, is a figure that's almost as posable as Revoltech Transformers figure, still transforms), has internal blue lights that scatter throughout his upper body, and so many exchangable weapons & accssories that we we like to think of him as a "customizable" custom. Hope you guys like