O.K., so I got the heatsink,and my emitter and the Mag 3D. So Far, so good. /ubbthreads/images/graemlins/help.gif I also have the spec sheet from Luxeon. Sooooo...Is the anode attached to positive, which, I presume is the center post of the battery through the switch? That would leave the cathode to hook to the negative side, right? /ubbthreads/images/graemlins/banghead.gif NOW quit laughing!! This is SERIOUS stuff! /ubbthreads/images/graemlins/Christo_pull_hair.gif Let the modding begin!!!