You gonna love this light.
I got U2 two weeks. My first SF, I'm using it as EDC light. I bought it second hand, I won lottery - I can open head without any pressure - focus beam to remove donut, WW0S is on the way to swap emitters. A friend of mine will make for me another body to use 18650 cells, maybe also short body to use one RCR123 cell.
Great light.
Mike