When you get your Thunder, let us know how the filter fits.
My Thunder AX came yesterday and it is an impressively made device. After close examination I can see no difference in build quality between the AX and my U2. Emitters are threaded into a fitting which threads into the flashlight head and is covered over by a lens holder which threads onto the bezel. Everything is hand-tight, precisely threaded and has substantial heft.
Outside, targets can be blazingly lit at 25 yards and well-lit at 50. Tinted car windows are no big problem either.
The SF FM24 diffuser filter does not quite fit however. It could be made to fit by wrapping the head with some tape, but I will not be inclined to put a diffuser on this light. The hotspot of three Crees is very broad, but there is also sidespill from three Crees and this lights up a broad enough area that a diffuser should not be necessary.
Unfortunately one of the emitter modules stopped firing and I haven't been able to determine a cause. It may need replacement, but if so that is not unusual. My first U2 emitter burned out shortly after I got it, and it took three tailcaps before the thing worked properly. New products sometimes have a few bugs, but the Thunder AX is well worth the money and well worth ironing the bugs out of, just like the U2. When functioning properly, this light is exactly what I need.
