Does anybody know of a current availible tailcap or mod that would give the E2L Cree a two-stage switch? It would be terrific to have an ultra-long life setting available on an already efficient SF. Mechanically and electrically, would a two-stage switch designed for the older luxeon model be compatible with the present generation E2L? There's a lot of old threads on two-stage switches, but I don't know what information is relevant.