What should I do to my old 4D maglite? I would like to use 4D alk . I saw a K2 uwon LED mod, but it was a few years old. I am looking for at least 200lm output with good runtime. I don't care if it is Direct drive or uses a driver, but I just want it to be reliable. I am a newbie, but just unsure of which components..Please recommend the components and set-up ie; which LED, resistor(if needed) and/driver. Any infor would be greatly appreciated..... BTW this was brought on by a lousy nite-ize drop-in and the purchase of a fenix pd30 which made it clear that the 4D mag was horrible.