The Energon Pub

I've got the Armada Unicron and would like to change the LED in his head so that he will have green eyes (and maybe switch it so that the eyes can be turned on and off, and when on, they won't blink). Does anyone know of any good tutorials, or maybe if you've done it yourself, could someone post a tutorial? I scoured the internet, but couldn't find anything.

I just don't want to accidentally destroy the figure since I don't have much experience with LED's.

Thanks!