I think you misunderstand me. I dont want to switch leds, I am just wondering if it is possible to unscrew the TIR from the E1B and then screw on the reflector from the Kl4, leaving the Led and board untouched. Basicly making a reflectored E1B.Won't work. Incompatible parts. You probably can transplant the E1B driver to the KL4 if you want a two-mode KL4 Then, you'd have to make sure that you have a compatible LED as well. Doesn't the E1B use a Seoul P4 or maybe a Cree XR-E? If you have an old KL4 with Lux V, the E1B driver probably won't work that well with that LED.
You are completely correct, I dont know what I was thinking. Thank goodness that there are helpfull individuals such as yourself to educate the rest of us. I really dont know what I would do without such constructive informationYour assumption that SureFire parts are interchangeable is fallacious. Combining that with a lack of knowledge of how to select correct LED/driver combinations leads you to a fallacious conclusion that mod'ing two expensive heads to make one working head makes sense.