i used the top of an old lantern, a few random motherboard components, clay and some balsa wood that i carved out. for size reference i looked at as many pictures as i could find and the still frames in the movie. then i molded it and cast it out of smooth cast 65d glad you like it. was planning on putting magnets or a suction cup on the bottom not decided yet. but i'm definitely going to be putting lights and a functional knob on it maybe even a small speaker so it'll beep when i cast it i put a plastic cup in the bottom so it's pretty much hollow plenty of room for electronics and a battery