I received the B158 +two extra pills yesterday and did KKW's mod tonight with the dedomed XP-G2 S4 2B. As driver I used an AK-47C1 (set to a simple 10%-100% because of the forward clicky, there's no memory and low is always first in this driver) with the 7135's replaced by one FET. Tailspring and driver spring were bypassed with 20AWG silicone wire, ledwires are 20AWG, ledboard was soldered to the pill.
I still have to do cosmetic stuff for the beam (blackening everything around the led) but of course the first thing to do was measuring the throw. Measured at 7.00 meter distance, with a VTC5 at 4.20V. 30 seconds after switch-on, I measured 322 kcd. :party: With a 30Q at 4.16V I measured 316 kcd. The output isn't at all plummeting down btw, it is a nice stable mod :-)
I have not measured the current yet, probably between 4 and 5A? For good focus, I had to unscrew the head a bit for extra lens distance from the led, because of the ticker Noctigon and dedomed led, while the dimensions of the flashlight are made for a thinner board and a domed led.
I'm super-glad that we managed to get the brass ring with the pill, even with my 25W iron I could solder the driver to the ring, and then the ring was easily pressed into the pil with a vice (one side first, then the opposite site, you get what I mean), I did not fully press it in, so that I may get it out again one day.
Thanks mhanlen for getting the group buy for this light plus the extra's done! I will love this light!