What have you used to achieve this effect?
I have used an old cotton T-shirt together with Brasso
The finish of this flashlight is not 100% smooth, as you can see on the image
It came that way actually, but it is not very well visible on the first picture with the patina on it.
DQG Spy SS Nichia 219B SW45K 9080 & GITD.
Convoy S6 XM-L2 3C & Lighted switch.
MBI HF-R Copper Nichia 219B repair.
FourSevens Mini Turbo Mk II XP-L HI 5A3
That MBI HF-R Copper is sweet , i haven’t seen one before .
Yeah quite rare, isn’t mine unfortunately, just needed fixed.
Xiaomi 10000mAh Powerbank II hack.
Built in short micro usb lead and 3W warm white cob LED with reverse clicky switch, acrylic window.
I usually do the lead mod with my powerbanks but noticed there was maybe just enough space for the cob and a switch, so why not ;) 
The MBI HF was among the first custom direct drive lights, these from Japan and running on custom made high discharge Li-ion cells. I was very into the MBI products when The-Guy-With-No-Name was first getting started, have several HF’s, a Torpedo and an aspheric head for a Ti HF. They’re very compact and tweak all the output possible from a small cell.
As the story goes, the inventor worked for a large Japanese company that dis-allowed the employees to have a public face, hence, the-guy-with-no-name. 
His packaging is incredible, especially with the Torpedo, really way over the top…
Stuck a Quad-5D XPL HI into my grey D4 last night.
It’s bright, but something doesn’t seem quite right. The 5D emitters that came with my cyan D4 and Titanium D4 are both considerably brighter on turbo mode and heat up considerably faster. I suspect my grey is outputting about 1000 lumens less on a fresh VTC5A. Not sure what’s causing the loss of output, but I don’t think it’s the emitters as I had the same issue with a previous set of XPL HI emitters in my grey.
ArmyTek Wizard Pro XM-L2
Nichia E21A 6500K R9080 & 5000K R9080
Next mod on the right……
That’s a sweet mod. Good job!
could be just the VF. As soon as bat Voltage under load falls below VF you will lose output.
Hi,
First I tried it on my regular 6x Tail boards with conventional 6 Balance resistors and a 1kOhm Bleeder
Main Problem was that with low battery voltage the higher voltage LEds (Blue, White, pink, ice blue) get dimmer tan the low voltage ones (red, yellow, green)
I came up to enhance this idea with a voltage regulator, but had to do some steps to make it work
first get the voltage and resistor value for each LED at the same brightness
Then I made some calculation to get fixed current draw versions
It is also possible to use this with side switch lights like Convoy L6, as I can get the parasitic drain for the 18kOhm bleeder down to 0.4mA when the tail board has 0.15mA for the LEDs
Now the first 4 Prototypes
I did quite some measurements and tests to even out the brighteness of them
Firt L6/L2 prototypes are build and successfully tested on my bench, modding the lights will follow
One tme i skipped the very current hungry Emerald green for a warm white
The tail board itself uses a voltage regulator so the brightness is constant down to 3V cell voltage and can be fitted with 1S or 2S voltage regulator
The 2S Voltage regulator has a 0.1mA higher drain
I haver also ordered fitting 3x3mm trimmers so that the brightness of the board can be adjusted for 2V and 2.5V LEds in 2 groups
On the other hand I can also build em with a current draw from 0.15-1mA with the balance resistors without trimmers
The rainbow LED boards have one drawback which are the inefficient Emerald green and yellow LEDs,
so their brightness is lower than green or white LEDs at the same current
Convoy M1 with Luxeon MZ 3V 5700K 90CRI led on mosDTP powered by 12Amp LD-B4:
Ceiling lumen show around 2200lm LED lumens which matches Koef3 test. Tint is very unusual because of combination of high CRI and hight CCT. Beam uniformity is best I've seen, just pure white light without color deviations. It looks like there is small donut hole in center of beam, but it's not very noticeable,in any case much less annoying than CREE XHP50.2 purple spot and greeny/yellow corona.
Test at 100mA:
That looks really good. So you have to fiddle a bit with the center piece to make it fit, then this led will work very well in any flashlight with a decent OP-reflector. 
Are you planning to sell the led as well? (MZ90CRI 5700K)
Gasket is stock rotated XM-L, it works good enough, maybe focus point is not perfect, but actual amount of throw is impressive for Convoy M1 with op reflector, reason for that is lumen output and domeless design of course.
I was trying to get T bin of LMZ7-QW50 ,lumen output should be 30% higher, but I'm not sure if it's available anymore.
Very nice build led4power!
There is any reason to use washers for the screws?
Btw, your pic reminds me of builds way way back:
20182009**
That convoy host has unusually large diameter of MCPCB space,23-34mm, washers help to center MCPCB.
Another couple of DQG's today.
DQG Hobi ti Nichia 219C, magnetic forward clicky tail switch. Can work by tail switch or twisty, starts on low or high mode.
.
.
DQG Hobi ti SST-40, QTC/ direct drive. From 0-200lm variable then 1300lm DD.
