Capn Kirk's post (#19) is an outstanding reference for a DIY lighting kit. I based my lighting for my E55 and E41's on his specs, and maybe this weekend add a pic or 3 if someone can tell me how to do so. He also added the BackOff XP modulator and has a seperate post on that. Extremely clear with great pics. The biggest thing - I found - was to get the guts to start cutting, splicing, and soldering. Oh, and make sure there's actually enough room under the lenses on your case to put the LED's.