I had never read this on any of the threads concerning this conversion. If you're like me and God forbid, have an "old" Mini Maglite, (and some of you must have as we "old timers" tend to hang onto things), and want to do this conversion, IT WON'T WORK! I ordered the module. After receiving it, low and behold, it only works with the "new" Mini's that have the two pin-hole lamp bases. I don't know when this change occured in the Mini Maglites. Be forewarned that if you have an older Mini, it won't work and you'll have to spring for a new model which, (of course), will add significantly to the cost of the conversion.