Get a cheap C8 with a nasty XRE in it, discard all the guts.
Cut off the driver compartment on the back of the pill & machine a new counterbore to fit the 17mm driver, cut out the flat base of the XRE reflector, make a centering ring/spacer out of scrap plastic, pick up some 18350s (hopefully better ones than the ones I got stuck with), add a MTG2 and a dash of copper, mix well.
Pill needs to be shortened to fit (barely) the two 18350s, also needs attention in the tailcap to gain as much space as possible:
Plain Nanjg 105c with a 150 ohm resistor & 4.6v zener diode added to keep the MCU alive at the new higher voltage:
Moonlight mode (using Nlite firmware; mode order is high-mid-low-moonlight, no memory, always starts on high mode):
These are probably the worst 18350s on the planet. Runtime is around 15-20 minutes before the weaker cell's low voltage protection kicks in and the whole thing comes to a screeching halt. And if I use more than 10 7135s, the overcurrent protection trips. Right now it's only using 8 350mA chips (only 2.82A at the tail), with better cells and 3 more 7135s it would be neck and neck with this very good SRK from FF/CNQG using XML T6 3C (5000k).
mouseover for the SRK: (they are aimed at slightly different spots, sorry 'bout that :( )