Hey mate cool mod!
You can find heaps of XHP50/70 drivers in that size.
Ringy beam could possibly be fixed by shaving the gasket down
Hjeh, tnx. It was more to get rid of the lousy UI and resistors, and get what should be more or less constant current. I figured if no one ever used one of those drivers, it’d be helpful to post the “mod”.
I’m kind of afraid to try it with 2 18350s, because I don’t want anything to pop and have to go through this alllllll over again. 
Damn, didn’t measure the tailcap current last night. Was meaning to, but got sidetracked.
But alas, it’s more like 700lm from a single cell. Lit up the room nicely via ceiling-bounce, but when comparing it to my VG10 on high, it wasn’t as bright. Was more like my ~700lm ’502, in about the same 5000K-5500K CT.
Still, I’ll take it. More runtime, less worrying about overheating, etc. Wasn’t even getting the F13’s head warm, let alone hot, so a) I need to grease it up with AS5 to make me feel better, b) my 26650 might need charging (been using that in my DV-S9 for quite a while), and/or c) the F13 soaks up and dissipates heat very nicely.
I bought a single cell boost driver from kaidomain in that size it would go awesome with a xhp50 and 26650.
If you ever want to upgrade in the future.
Got a part number?
I will do you one better 
They have more options for 22mm drivers.
http://www.kaidomain.com/p/S025264.FX35-22mm-3V-4_5V-2_5A-5-Mode-Boost-Driver-Circuit-Board-for-Cree-MT-G2
Oldlumens done heaps of mods with these lights he liked them.
I will have to buy some my self and play with them they are a fairly cheap host.
The driver i bought was a different colour. Fasttech just got some in the other day also i was looking at there email i am not sure about the sizes.
If your happy with the lights leave them but maybe in the future you will want a pocket rocket.
Ugh, same insufferable blinky modes…
I just looked again at FT, either I completely missed them (doubtful) or they just got in an assload of new 22mm drivers. All for XHP50s/-70s, and all seem to need 2 cells.
Maybe I could use the pair of 18350s I got (wasteful to use an 18mm cell when you can pack in a nice fat 26mm cell), but I hate putting cells in series, and I don’t want to get 26350s or whatever, just for this. <grumble>
Well, it had better be a big pocket for a ’13, at least.
I saw in the spacer thread that someone was really happy with the spacer to make a F13 into a triple.
Eh, I’m not into floody lights (yet). I like the pretty tight beam of the ’13. Almost as tight as a C8…
Yea the drivers from fasttech are for dual cells i was thinking about buying some F13s and put the 4amp driver in and use a shaved down XHP50. Just for a laugh i am all against using none versatile flashlight but then again i always run my C8 with a XPG3 that does 8amps. Using the 26350 the run time should be decent even 30mins at 2500+ lumens is good.
I think the throw would be decent?
Richard has a 22mm driver, and you can choose firmware, driver current and spring/no spring:
At that point, there’d be lots of overlap with my L2. And that I can run with 1 or 2 26650s. With lots more runtime.
I’m confused already as to which of my “active” lights I should take to go see what’s making noise in the backyard, or looking for the armadillo, seeing if the cat ate his food, etc., that it’s already a long drawn out decision. Adding another light to the mix would only confuse me more.
Yep, saw that a while back, before ordering these donks from AX.
Problem is, the way those 7135s are situated, they might probably would clear the thin ledge on the LED side, but no way would the retaining ring go over those on the spring/battery side.
Same situation with the NANJG 105C vs 105D and the retaining rings on S2+es. The C (with stars) will fit, but the D (no stars) won’t.
—
Just recalled, I was debating getting it anyway and just desoldering the 7135s on the spring side. Only 3A instead of 6A, but it would fit the ring.
Do you need EagleEye X6 host for $ 10.99? 
Regards,
Ooh, nice price, but I think I’m all flashlighted out for now.
Always liked the shape/style of the BLF/EE X6…
I just suggested … 
You were looking for a driver, and now, apparently, you are well guided in the proposals.
What driver (XHP50.2) can you advise for my “project”?
Haven’t used any boost drivers except for Mag mods, so don’t have any advice on that.
The one above looks interesting, though. Would rather no blinkies, but…
Give me a link please
Yea I bought the other model of the single cell XHP35 boost driver. The original one
The one in msg 15, that D10ten posted.
Points to a driver on KD.
I also want to try - the host is already going.
What is the diameter of a star?
And can I try XHP50.2 with this driver?
This is a 22mm driver and will only work for 12V LED. The good thing is the strobe is hidden and I have not activated by accident yet.