Post #122. NarsilM will do 4 modes, but I much prefer smooth ramping - pretty incredible in this light, and 12K is way under the max in mine 
, but leaving in the stock LED's, 12K might be a reasonable expectation.
oh yes ramping seems impressive.
Where do you buy this driver ?
I bought the bare PCB from OSHPark, then bought the parts, reflowed the parts, dnld'ed the firmware. Not sure how that works overseas though, or if you are at that level.
OK and it can be find directly soldered? I’m from France
No, not as far as I know. Maybe you could try Lexel - not sure.
Yes, Lexel ships from germany: [Sold] 4. Batch "TA" Bistro/Bistro HD OTSM/Narsil drivers, 46mm for Q8 1S or 2S, Clicky or E-switch, SIR404 or http://www.taschenlampen-forum.de/threads/biete-ta-treiber-verschiedene-größen-3-7-oder-7-4v-narsilm-oder-bistro-hd-otsm.58181/
Hello
I keep you updated, I change the driver because one of my xhp70 got less output than the two others with stock driver.
Lexel send me a TA driver 46mm with narsil firmware.
Wouaaa that’s so great I love ramping in this light. And turbo is more powerful than original 9000lm.
shish
now u got me excited.
i want TA driver 
Yes get one you won’t be disappointed
Hi fellow HaikeLiters,
I found something odd with the behavior of my MT03 II, at Turbo level, one of the emitters does not emit light properly. I have also a video of this happening (please read video description as well).
Could you please give me hints, what could cause a behaviour like this?
i had exactly the same behavior !!! one of the XHP was not properly driven.
I changed the driver board with a TA FET driver and it works better.
Please contact LEXEL he can solder you a FET driver with the so good ramping firmware NarsilM. Sell price less than 20€.
Thank you for the suggestion! I will contact him.
Hello guys, I recently got the MT03 and there is a defect on my AR coating. Just wondering if anyone can help me on how to remove the lens… I’m trying to contact GB and HaikeLite to see if they can send me the new lens and I fix it myself… Since I heard shipping the light from US to CN will be like $60….
The light is working properly but that defect (about 20~25% area are not coated/ or doesn’t have purple reflection).
On the head , there is the steel bezel , press it against your hand , and turn anti-clock wise . Now you should be removing the bezel .
Just check that you can unscrew the bezel , don’t remove the glass lens yet , so the reflector and leds stay dust free (until you get the new lens .
I just gave that a try and it does twist and moved! Not going to open it as you said.
Thank you very much! Now I know this is a easy fix with a new a new lens.
Lens
Any helpful hints to a complete newbie here on how to get access to the driver on this Haikelite mt03? bought one about 3 months ago… it lasted about 15 minutes of run time and, apparently, the driver is bad… Banggood just gave me the run around - worthless customer service and replacement policy - Haikelite sent me a new driver… but now i need to figure out how to replace it! what tools needed? any help out there?
thank You!
as a complete newbie, good luck. I’m in the same boat. I have the light and just purchased a custom driver for it, will be here shortly. Take the head of the light off, you will see a metal retaining ring with 2 small holes in it. Use some needle nose pliers, get a good grip in those small holes, and turn counter clockwise … it will unscrew. The driver board is under that. LOOK under the driver board, there are some 10 wires that need to be unsoldered. Good luck on that, those wires are so short u can hardly get at them. If u remove them, replace the old driver with the new one, making sure you solder the wires back into their correct place 
Better find someone who can do this for you, someone skilled in this stuff - very easy for them.
If you guys are still stuck with your driver issue and live in US, why not consider asking TA to help install his custom driver into your flashlights.
The MT09R driver that he did also work on the MT03 II. See his thread below:
Texas_Ace MT09R Modding thread, 22k lumens, 80CRI, can start fires? Yes please.
Apart from the Samsung 30Q, does anyone know what other batteries are best for the MT03 II with 70.2 LEDs. TIA! 
Have you found a place to order a spare AR glass lens?