Nice, but what did you buy them for? They’re not click on=click off, they’re on as long as you push the button … The only application I can see is for calling the elevator you must be constructing yourself 
I explained earlier:
I will only use the top bit: the outer ring, the translucent ring and the button. And a bit of the threaded part.
The switch i will not use.
I will cut it off under the nut (moer), it will use just a mm more space than a normal slicone boot inside the tailcap.
(at least, that’s the plan…
If it’s impossible maybe i could put it ‘as is’ in my Courui)
Sounds interesting! Please let us follow your progress 
same here ordered it and waiting to see if it will fit ,i will let you know.
Correct, it will physically fit with minor sanding.
The S2+ with metal button is a special case though, the little plastic ring lets very little light through.With that old design, the light will either be too dim to be visible, or draw so much power it won’t be worth it at all.
Have fun tinkering, but I wouldn’t recommend it.
I will.
And when it’s all too different from what i expect, i will just build that private elevator. 
PS: The nut probably isn’t gonna fit, so i will make it a ring shape or just glue the lot in place with grey epoxy.
We’ll see.
Modders, I’ve been wondering what would be the best tool for retaining ring removal and thought I would ask here instead before I bend all my tweezers tip :person_facepalming:
TIA
This retaining ring on Tool Ti doesn’t seem want to budge :weary:
Needle nose pliers (is that what they’re called?) would be good.
Haven’t got one myself, did have one like it but with flat bits, but can’t seem to find anywhere… (lost in some unknown dimension)
Have one with a bent beak though.
But i usually use my sturdy tweezers.
Sometimes i drill the holes a little wider for pointed pliers.
My Leatherman has rather small tips too.
I usually get it turned loose eventually.
But sometimes those rings are threaded anti clockwise…
Yeah I haven’t met a retaining ring yet that was a match for a set of small precision needlenose pliers. I find tweezers easier and faster to maneuver, but they just don’t have the strength for breaking rings loose, or fully tightening them. So I always start with my needlenose to break the ring loose, then switch to the long electronics tweezers to spin it out the rest of the way.
A very important point. Convoy especially likes to do this. Be careful.
I bought a couple of the BG switches linked above. They seem decent quality. I put one in an old tube light, and indeed it does work. Unfortunately, the light it gives off is a very dim blue, and the light has become the dreaded next mode memory. It does work though.
I cancelled the order for the 19mm switch.
I received my S41S XP-G3 today (yippee! BRIGHT!!) and it’s not gonna fit.
So now i ordered a 16mm switch instead, because the hole in the tailcap is just 14mm, so 16mm is enough.
https://www.aliexpress.com/item/16mm-12V-LED-Illuminated-Momentary-Push-Button-Switch-Short-Body-total-length-21mm/32440604575.html
The switch PCB already has pads to solder SMD LEDs and resistors on by the way.
But the switch itself is rather flimsy i.m.o.
I’d like this too, I’ll pm you after the holidays…, no rush…
fit just fine,the switch lights ,but i cant power on the flashlight (need to mod it i guess with resistor),the only problem is the aluminimum spacer between the switch and the rubber block lot of light,of course you can drill it.
If your light won’t come on at all there’s some other issue besides the bleeder resistor. Are you sure the switch board is making a good connection to the flashlight body?
thanks for point it out,update some sand paper and now its perfect fit before i thought was ok but it wasnt ,now works just fine with this driver ,all modes are working.
which size SMD works in these BG blue-lit tailcaps
I see a lot of different SMD sizes — I’ve been looking for amber:
https://www.aliexpress.com/popular/amber-smd.html
The switch bought separately has two 0805 LEDs.
Astro, BLF light that came with the lighted tail cap used one 1206.
Many other Astrolux, BLF and Kronos lights already have the same board used on the lighted tail models but No resistor or LED installed.
Either 0805 or 1206 will fit.
Wow, ten for $5 or hundreds at a penny apiece. Cheeeeap …. Extras! Someone should make light-up earrings or piercings out of these things …
Just bite down on a bimetal strip to power them ….
If I were to swap these in place of the blue ones, I bet I’d need to change a resistor, right?
Voltage table here: https://www.aliexpress.com/store/product/100-pcs-SMD-SMT-0805-Yellow-Super-bright-LED-lamp-light/1267031_1889424846.html
Any update. I’m very curious