mrdee3,
Modding the E1e with an LED is actually a fairly easy mod. If you can build the ecan/esink pill, drilling out the head isn't hard, especially if you have access to a drill press.
I would recommend building the pill with one of the MadMax converters. The MM line of converters generate much less heat than the BadBoys do. With the BB, it will get pretty toasty, even at a 400mA bias. I (and lots of others here) have done many of these.
I wouldn't recommend this mod for an E2e body, becasue there are many better alternatives; but this mod on an E1e transforms the somewhat anemic E1e into a truly useful flashlight.
All you need to do it use an esink/ecan to build the pill with your choice of luxeon and converter. Then you drill out the center post of the E1e head with a 13/32 (I believe) drill (gotta get it straight) and voila. Some have done the drilling by hand using a hand drill and vice, but I would recommend doing it in a lathe or drill press.