I did this figure few months ago. But only now i discover how to post it. Im a nooby. This Op yellow bulbs in the head stil remain. I added another blue led in there but it wont affect the original things, it still blinking yellow while he talk " i am optimus prime". It is really pain to mod the waist headlight. I dun have a dremel but i using a borsch hammer drill. Imagine using a big drill to drill a small area. This modification i stealing from Hakka. Thx alot. Well, this is my 2nd post after i doing a test-post using old picture yesterday. Im jus doing electronic modification because im not a good painter. This optimus is not complete yet, i still waiting for the fiber optic to make the roof lights on. i have 2 led in the blade, i using tis stuff to shave the led into the shape as space on the blade. so it fits perfectly into the space, no worry, it wont affect the brightness of the led. And i make a drain to store the wiring, u see the red wire? Actually i get the inspiration after saw wat encline did. I jus do some minor modification to bury the wire and led. My blade is not removable, tat why i must bury it, so it wont affect transformation. Im thinking of bury 1mm or 2mm fiber optic at the red wire position, it should lights up whole blade right? Anyone test it before? Night mood, sorry for the blur images, because i dun have a light box.... Tis is a short update how i do my OP's head while keeping the original yellow bulbs. Place 2 tiny watches battery in the mouth area which is the red box area tat i draw. Wired to the on/off swithc to be mounted at the back of the optimus head. Shave ur LED as i did, then bend the LED rod to just fit into the clear plastic eye, u do not nit any glue. I couldn't get the on off switch from my local shop, so i hunting around to find a toy with the tiny switch. If u can get smaller switch is better. I only manage to find tis jus right enough for the room of the head. And by the way, i still looking for Thicker Fiber optic to do tis, i got these FO but too thin, anyway if i cant get further...will using this anyways.