For once, I doubt mine will be changing soon. It's just too good.
Along with the old Arc AAA-P on my keys, I've been carrying a SF E2L modded by mudman cj.
I've never really embraced single cell lights, or any but the simplest of UIs, plus the size and weight of the E2L aren't noticeable to me, even in lightweight shorts.
This one is bored for a protected AW17670, has a natural McTC tailcap with McClicky switch, Q4-5B emitter, McR19XR reflector, and light diffusing film from flashlightlens.com under the lens.
Not sure how long it will stay in regulation on a single Li-ion, but should get between 4 and 5 hours on high(with a beam equivalent to my favorite Malkoff, the M60WLF), and might hit 3 days on low from a 1600mAh 17670, since it only pulls about 20mA.