Just on the offchance it could save me opening it and looking for my self does anyone know what kind of LED these units use? Specifically a LTR40125S. The usual seems to be 5mm dual-colours, can anyone confirm (or even better point me to an article)? Inquisitivenessicity (look it up ) finally got the better of me. It is a 5mm 3pin LED alright. Its cloudy, obviously to diffuse the light, so I'll have to rough up the new LED I'll be chucking in there ( http://www.frozencpu.com/cgi-bin/frozencpu/ele-51.html ). I think it should be a fairly easy mod... famous last words. Not even last words... I've just found out that its a tri-colour LED (hence the 3 pins). The LEDs i was going to buy from that URL arent 3pin (as the picture would have u believe). Grrrr