Mod doubt:
I have a brass ring that I will use as a spacer (17mm-23mm) for a 17mm L4P driver.
My doubt is how should I attach the driver to the ring? Solder? Epoxy? Any kind of wires?
The ring is supposed to be on the spring side (of course) and I will sand/file/bore it till the inner diameter matches the driver (to avoid contact with the wires or spring.
But I’m having these doubts about how to attach one thing to the other ! Any help is appreciated! Thanks in advance 
Whatever you do, attach it so that the battery pushes the driver into the ring tighter (ie, sitting on a shelf), and not that it could push the driver out of the ring.
If you have a set of step-bits that does 17mm, use that to get a nice flat bottom in the ring, even if it’s almost foil-thin. Don’t drill all the way through and hope that solder will keep the driver in place. It may work for a while, but constant hammering on it might weaken the solder to the point where the driver gets pushed right through, probably taking some copper traces with it.
Yep, what he said, and always best to solder if you can.
Got done with an emitter swap on my S1R II Baton, used a filed down Convoy S2+ DTP board with a 90CRI Nichia 219B 5700k emitter.
I got far too involved with actually doing it that I didn’t take any photos apart from the filed down DTP board installed in the light itself, and it was a bit of work filing down the edges of the board to fit but once it was done it went in smoothly.
Most people have reduced the thickness of the board itself to compensate for the extremely thin stock board that comes in the S1R II, I chose to file down the white plastic cup the TIR lens sits in instead. It allowed the TIR to sit flush with the emitter board and the opening was just the right size for the whole emitter to sit within the lens. Fully assembled the bezel ring sits flush without any gaps. Nice! Of course I forgot to center the ring. A minor detail, but if it bothers me enough over time I’ll end up fixing it.
One thing of note is that it gets very hot now compared to stock. Running it on turbo the head gets near D4 levels of hot after some 30-40 seconds. Not hot enough to burn, but extremely uncomfortable to hold near the head. Given it’s a marginally noticeable bump between high and turbo and doesn’t get nearly as hot nearly as quickly when on high, I’ll limit turbo to quick blips here and there.
Here’s some comparison shots, photos taken at 5000K WB, color corrected for 0 green/magenta tint shift.
S2R II Stock SST-40 6500-7500k ||| S1R II 219B 5700k 90CRI ||| BLF Q8 LH351D 5000k 90CRI ||| Emisar D4 SST-20 4000k 95CRI
And color comparison:
S2R II
Nichia S1R II
D4 SST20 with a 10623 optic
Needless to say if it were easier to remove the bezel ring on the S2R II I’d do an emitter swap on it in a heartbeat.
Nice job! That’s probably actually a preferable method for Nichia LEDs since they tend to have a slightly lower optical reference. What tool did you use to pop off the bezel?
Used this video as a guide with a utility knife, regular knife, and then a flat head screwdriver, tapping the head of the screwdriver on the back of the knives to slowly wedge the blades in. It was a lot easier than I had expected.
A knoife ? :-p
Thanks for the answers Lightbringer and CRX! I forgot about the pressure the battery may do. Will have to think it well!! Thanks again
FourSevens Atom XHP50.2 3v K2 2A - H17-F - 16340 - RV Clicky Tail Sw - 2500lm.
That’s awesome. Do you have any idea what the turbo current is on the S1R? I am planning on swapping the emitter to the SST-20 3000K or 4000K, maybe to a Luxeon V2 4000K if the output suffers too much from the high CRI.
Reylight LAN Mokume Gane with electronic tail switch, D4v2 ramping firmware driver, emitter swap, extra copper heatsinking and all tritium vials installed.
LAN Mokume Gane XP-L HI v2 5000K - FET 15+1 D4v2 - 14500 - Electronic Tail Sw - 1300lm.
Verry nice! I like the red trits also, are they visible enough compared to ice blue or green?
Yeah I thought red would go nice with the light.
Might just be my eyes but in the dark the red trits are almost as bright as the green vials, really noticable to me.
Other colours are a lot dimmer.
e-switch in the tail? What, how? Do you have any details?
There is always more details in the links 
The red tritium vials are said by the manufacturer to be about 20% of the visibility in brightness of the green ones. I’m sure the observer’s particular eyes are going to perceive things differently sometimes but the normal list is like this…
mb-microtec in Switzerland has been making tritium vials for 50 years, they say the red is the lowest visibility with the green the highest, the above chart is taken from the mixglo site but I think it may have originally come from mb-microtec. I do see differences but they don’t seem as exaggerated as the chart would indicate.
Did you know that Tritium is also called Heavy Hydrogen? or H3? And that it’s unable to penetrate human skin? Or that it breaks down (decays) into Helium? In a watch with 14 Tritium vials, there is not enough radioactive material present to harm you any more than eating banana’s! (That’s IF you could ingest all the Tritium from the vials at once which is virtually impossible) The potassium in banana’s decays into radiation, so if you eat banana’s every other day you will have a low radioactive glow about you. 
The typical Tritium vials we see contain 25 millicuries of the radioactive isotope of Hydrogen. There are also versions in watches that have 100 millicuries, listed as T100 while the lower is T25. The T100 is said to be 4 times brighter and glow twice as long, up to 50 years…
I have all 9 of the colors listed installed in my Titanium X6. With 2 Green as separators.
Thnx! That was a interesting read.
I put a 219B in a Zebralight H53Fw. Tons of photos and measurements here: Zebralight H53Fw Emitter Swap and Review - Album on Imgur
Not totally sure, someone more knowledgeable could probably chime in. My best guess is somewhere between 3-5A. The Olight 16350 the S1R II comes with is a 550mAh battery rated for a 10C discharge, so peak output for the battery should be around 5A at full charge. The output isn’t 1000 lumens with the LH351D, but it’s not terribly far off judging by eye. I have no real means to measure current or output.
Yes on the D4 bosrd I use pads that are almost as small as regular 0402 pads, bigger does not fit, very tight fit to get all those LEDs on the tiny useable surface