I just came across on ebay versions of the L2i using both MC-E and SST-50s. Looking at the ITC's own websites, they may be selling these drop-ins separately as well. Intersting that they still sell the L2i as a 3xAAA compatible light while using the MC-E and SST-50. Am I wrong in thinking that 3xAAA would have a hell of a time driving either one of these emitters?