I wonder if the printer ink will melt and run around inside your light if you run the light on turbo for awhile.
Anything’s possible so modders be warned.
BUT, fortunately it hasn’t happen (yet) on the lights I’ve tried, whereas my earlier attempt with a separate plastic collar melted. And, a miniscule amount of ink is used. I probably gave the wrong impressions when I previously mentioned the ink “caking”, misleading choice of words. Really I mean the ink drying out on the dome material.
The coloration should really be just a clear, almost like AR lens coating, tint and not an opaque layer.
I modded a C8+ Desert Tan with a white flat, warm white/gold lighted tail switch, and LD-A4 driver 5A from led4power.com. It's a mini light saber! I don't have the exact figures but it looks like it easily beats my L2 with a MTN buck driver 5.1A driving a XP-L HI. Next I will put a white flat in the L2…
Here’s a couple of images of my C8+
Tadaaaa:
B158B 4,55A 13x7135 driver: 345500cd
Same driver and led in Convoy C8+: 209000 cd
Same driver and led in Eagle eye X6(still need some focusing because I’m not happy with numbers): 117000 cd
Very nice :heart_eyes: I had considered this before but never followed through with it. Nice to know it can be done :+1:
First post, but - as per zak.wilson’s post re: Wowtac A2S and LH351D (SPHWHTL3DA0GF4RTS6), I did an emitter swap today. Didn’t think to take too many photos as I had some time pressure, but I think I did it the hard way - removed the battery terminal end, desoldered, and then took the emitter board out, and swapped it. Really should take beamshots…
I really should have thought that one out longer. There had to be a better way to remove the board. Resoldering the four wires from switch and emitter was NOT fun.
Thanks! And interesting: my clear C8 with dedomed XP-G2 S4 2B does 180kcd, so that is 16% improvement for the white flat. My B158 with XP-G2 S4 2B does 322kcd, so that is 7% improvement. So YMMV probably depending on individual led differences.
And it also can be more or less difference because of measurements error. And the XP-G2 only make that performance fully charged. Osram can maintain better when battery depletes because of low forward voltage
Modded Q8 with Luxeon MZ: led4power
And in 2nd step I bridged the springs.
Stock LED: 5200 Lumen
Stock LED Bypass: 6500 Lumen
Luxeon MZ: 7000 Lumen
Luxeon MZ Bypass: 10000 Lumen
I noticed no stepdown but the flashlight was realy hot.
4 donuts? or it’s just too bright to notice? 
Well I reckon I’m gonna have to get an image hosting service so I can post pics of my project. Who says P60 is dead? I started with a 2” diameter 6061 aluminum barstock today and started boring and threading some parts together, using an old infared P60 dropin for the dimensions. The plan is to have a triple emitter P60 built by someone since electronics arent my strong point, and my host is to be heavily finned and slotted for heat dispersion. Its coming along well but I havent decided on a dropin yet. Really it depends on how much the wife lets me spend haha. May have to get a cheaper one from Kaidomain for now and wait on a Sky Lumens or PflexPro for later. Boring the body for 26650 and a sleeve for 18650 option. My first flashlight build but Ive been machining for my entire life.
That's pretty insane! 10K lumens at 90 CRI in a Q8. The spring bypasses made a huge difference. I thought the dual springs were better than that, but I always pull the inside ones and replace with a bypass.
That must be 8+ amps per LED. Did you need anything special for centering, or drilling out the reflector holes?
I have a quad MZ that I measured at 28 amps on a single 18650. You can bet this is pulling at least 8 per
Please provide us more info if you could. Did you measure throw? How's the beam - does it have a significant hole? Are those 10K at startup and calibrated with maukka lights?
@TomE, don’t forget the dual springs are still made of steel.
Steel wire has extremely high resistance compared to copper alloys, even in a dual spring setup.
One advantage they have is that they limit current if the cells get into a short.
A dual BeCu spring setup in a short, if they do not fail due to heat, can actually be dangerous to the user.
Re-modded a Convoy S8 shorty today with a 1mm2 White Flat, BLF-A6 driver with brass post (no tail spring bypass), and a lighted tail with 660nm 0603 leds. I messed a lot with a centerpiece that did not work well, and it appeared that the stock reflector was very poor so after a change to a different one the beam was much better. One centerpiece and one reflector later, and an in the meantime rather battered led I got the focus right and it measures 41 kcd now with a great clean hotspot 
The 660nm leds give a nice almost crimson red but appear not very bright because the human eye can hardly see that wavelength. They should be great in the Fireflies E07 that I’m going to order sometime in the future.
Roof tops are at 50 meter
Sweet 
I didn’t think a “small” SMO reflector would work so good with these leds but it does!!
BTW, is that a short tube for the S2+ Convoys?
I like the shape of the S8!
Yea, I think I know, but of course they are coated steel, and under compression, and depends on the quality. I've modded over a dozen Q8's and can't recall getting that high of a difference from just the springs -- I could be wrong, but a 25% jump is pretty big. I thought our decision to go with standard double springs, though not our first choice, was better performance than single springs. I argued for heavier gauge inner springs though. The current goes through the coating, not much, or not at all through the steel - takes the path of least resistance.
I don't understand the heatsinking tailcap, and dangerous to the cell's life part of that... I'm at a total loss there.
Here's comparisons on a Q8 prototype of dual stock springs vs. bypasses:
Oh yeah I forgot to say “in a short”.
A dual spring array made of a copper alloy may not fail under extremely high current, so the cells may suffer.
Also, I do wonder why they didn’t listen to your recommendations. That would’ve been great.
I shorted a BeCu single spring and it would have failed had I let it. Either way it’s a non-issue because we use bypasses so often something else will just get nuked in its place. See Tom E burning up his switch trace