I just reduced a copper XP-G / XP-L Sinkpad to size using a belt sander, was not hard to do.
Sand all around up to about where the arrow points and it will fit perfectly centered
I came across these a few days ago and they were not available then.
In the description it says they ordered these for a project and ended up being the wrong size.
I suppose a few people googling “nichia 219b 4500k” might have snatched them up when they saw them at $2.00.
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@alexgt, when I done the same thing the hardest part was keeping the star cool enough to hold in my fingers. Sanding it with a belt sander puts a lot of heat in the copper board fast. The last one I done, I actually mounted in my vise and milled about half the thickness into chips.
Then sanded the diameter down to fit. 
Are they CC or PWMed?
If CC, a “weak battery” just might not be able to supply anything higher’n that (~70%). I get the same thing on lights with moribund AAs where high=medium, and when further depleted, high=medium=low, before they finally crap out entirely.
If PWMed, high just won’t be as high as when the cell’s new/charged, and lower modes will be proportionately lower.
If you use a 80 grit it will cut faster and not get hot as much, just keep a bowl with water to keep it cool, then use the fine belt for finishing and smoothing all around, I did not use gloves so I was sure I did not heat it up much.
Edit, I also remember pressing the MCPCB against the sander base plate so that helped keep it completely flat and transfer the heat from the MCPCB to the metal plate.
Good stuff. I got some from FT, use that on all my lights’ threads when I regrease ’em.
Congratulations!
Im had a V11R modded to 3000k 219c, but I found the behavior of the control ring unacceptable after that. The V11R w 219c drifted more than 65%, without touching the control ring. I could see that with my naked eyes.
a video:
If you have a light meter, can you check if the brightness continues to drift after you stop turning the control ring? Another way to test that, is to simply place the light on the meter with the clip pointed to the left, and then do it again with the clip pointed to the right…
these magnetic ring lights change brightness based on which way they are oriented in the earths magnetic field, without turning the control ring at all.
I ask because Im about to gamble again, and have my RRT-01 modded to N219b 4500k 9080
My RRT-01 drifts, but it is only 11% change, which is not visible… Our eyes can detect a change of 50%, my light meter is more sensitive
all I did to show the change was to pick up the entire light and reposition it on my homebrew meter, I did not turn the dial
I have seen a number of magnetic rotary lights modded, including to triples, but nobody seems to have ever put one on a light meter to verify how much they drift after the mod.
Most people dont notice changes in brightness, our brain is very tolerant of changes in lumen level… a light meter is really the only way to Know what is actually going on.
I probably should have done that, I just kept thinking just a little more and I’ll be done. Stubborn me :person_facepalming:
They’s a very fine Line between Tough and Stupid. Sometimes I think I’m standing on it. :confounded:
jon_slider I have seen that video several times, I guess it’s yours?
I have had the V11R in my lumen tube a couple of times and have not noticed any variance but I will check it at some point like you do in the video. On the other hand one of my V11R’s does have a flicker at about 70% brightness, like it can’t make it’s mind up where it wants to be.
I don’t see any drifting with my eyes, but I don’t own a meter to verify that.
The V11r I got was from the ebay link in this thread, but I got in after the initial round had sold out. Wasn’t really planning on getting one, but the price and the fact my old one got all scratched up from my regreasing attempts got me thinking I should get a spare. It was cheap enough, but I would’ve preferred it to be as good as the original. The XML2 doesn’t seem to make much difference brightness wise.
KuoH
Sorry, after all these years of plodding along in this hobby, I should know more. I consider myself basically and END USER Not sure what CC and PWmed refer to. I’m using an Olight 16340 cell, it was fully charged. I do understand what u are talking about however.
I may have been disappointed in some things but one has to agree this is a great light for the money.
sorry for your flicker issue… hope you solve it
thanks for sharing your modding supplies,
that may be useful for my upcoming RRT-01 mod to N219b 4500 9080
Can you share the Lowest Lumen reading for a stock V11R? and after the LH351D?
yes my youtube acct has the same user name as my BLF
I will be curious to learn more from your experience with your V11R’s lumen drift
owning a light meter has been a real eye opener
The step down on this Novatac from Maximum is not visible to the naked eye
few lights actually hold full regulated output, but their fluctuations are usually too small to be visible (<5%)
Here is the Novatac on a “medium” level, at which it is Very well regulated, less than 1% fluctuation.
Even expensive lights such as HDS and Oveready, will show fluctuations on a light meter. I accept that is normal for an electronic circuit.
The magnetic ring lights have much more fluctuation than clickies, I accept that too, if the change is less than 20%, since I cant see that with my naked eyes.
What really surprised me about the V11R and RRT-01, is that they act like a Compass, they know which way North is, and they change brightness based on which way they are oriented, in the earths magnetic field. With the stock LED, the changes are too small to see.
What Im seeking more data points for, is what happens to the regulation on a magnetic ring light, when an LED is changed. For me the N219c in a V11r made the light unacceptably UnderRegulated. But I love me some Nichia, so, being a slow learner, Im going to retake the Seminar on LED Swap Drift effects on Magnetic Ring Lights. (unless somebody with a light meter spares me the agony, and tells me what happens to a V11r w N219b, On a Light Meter!
Fun Science!
I cant see it with a stock LED either, my question is regarding LED swapped magnetic controlled lights, and a light meter is required, to know that.
CC = Constant Current, that is what the V11R uses
PWM = Pulse Width Modulation (at speeds below 1000Hz it produces visible flicker, but only 50%. of people notice)
Constant Current is used to mean No Flicker, but this is not accurate, it depends how slow the Constant Current circuit Ripple is. My Novatac is Constant Current, but I can also see it Flicker, on the lowest mode, with my (highly trained) naked eyes. I do distinguish, and respect others who commend about whether a Flicker, Ripple, or Circuit Noise produces Visible changes in brightness, in contrast to whether they can be detected with instruments, that are more sensitive than our eyes.
I agree the V11R even @$30 is a great buy! Enjoy 
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fwiw, it does not matter if a light is constant current, constant power, PWM, or any other power management type, all circuits oscillate, the question is How Much change does the circuit allow, in Percentage… Less than 5% is pretty good, our eyes cant see it. It will show on a runtime plot, on a phone, or a scope, but in actual use, it does not really matter.
Our eyes are constantly adjusting the Iris to change focus and brightness, even moving a light aim from a close object to one further away, changes how bright the Lumens are on the targer. This is all normal, and our brain is very good at adapting to lighting changes.
One thing I realized from using my RRT-01, is that I want to fiddle with the dial all the time… as I swing the aim of the beam closer to me, I turn down the brightness, and as I aim it further away, I turn up the brightness.
This experience has helped me to realize that Clicky UI’s are actually perfectly adequate for lighting both close and far things, we just change modes…
Since Im interested in knowing how many lumens my Magnetic Ring light is using when I select a level, I often check on my light meter. Ive realized that it is basically impossible for me, to set the light to the same level, twice in a row. That has made me wonder how an Eye10 would look on my meter… I wonder if the click positions on the dial, actually produce the same lumens level each time…
I dont have an Eye10, but its on my wishlist…
The V11R has the benefit that it can be switched on and off without turning the dial, a sort of mode memory, but once we move the ring, its anybodys guess what level the light is at the next time we dial up. Not that it really matters… I Love Ramping UI’s
Ya, it didn’t make sense.
Doing a search on Ebay it looks like all of the sellers of the really cheap V11R’s have vanished. If you do a search for Sunwayman V11R and then check the “completed items” box, there is nothing that shows up. It’s like the $18.99 price never happened. That smells of Ebay intervention. It just seemed too good to be true. At one point there were multiple sellers around the $29.99 price. One at $24.89 I think.
I seriously doubt this seller was a Sunwayman dealer. I just have no idea where or how he got 90 units to sell. The boxes were kind of thrashed at least on the ones I got. They also seemed dusty or chalky like they had been sitting in a warehouse somewhere.
I kind of suspected that once this cleared, the price would go back up to normal. I doubted that Sunwayman would bother to manufacture a light such as this to be sold so cheap. I think this was a one time event………legit or not. In previous posts I saw where someone got one where the low wasn’t sub 1 lumen but more like 5 lumens. I did get one like that too, but the rest were working like they should. I’m going to see about returning that one.
The seller on ebay who was selling them for 18.99 is now selling for 29.99. The seller had like 4 lights left, and likely just ended the listing, not sure why. I can see the 90 he sold for a variety of prices. He even sold one for 37.98.
I am grateful to toddcshoe for letting us know about this great deal, I had always wanted to try out this light.
Thank you! 
The $29.99 is gone, 0 available. $37.98 is a sale of two units at $18.99 ea. But the real clue that something is amiss is to do a search for Sunwayman V11R and then check the “completed items” box. Nothing shows up with this seller. Ebay intervention is my guess.
No problem my friend. I was just hoping it wasn’t a scam of any sort. I would have felt awful if we all got took on $19 V11R’s. Though I knew with PayPal all we would have to do is go through a few emails. I ended up with 5 of them. All working perfectly but, the lowest setting on all 5 are just a bit different from each other. I think one of mine went above a lumen or so but the other 4 were for sure sub lumen. One goes so low you have to really get your eye close to the lens to see it. I got three of them put back for Xmas gifts, I put one on the shelf to get into my EDC rotation and I put one away as just a extra to have around.
Good to hear that most people are happy with them. Just wonder if we will ever see prices like that again and if we will see any AA extenders pop back up for sale as well. I imagine they sold like hotcakes the last few weeks.
I see what you mean now. That is very strange . . . .
I was just catching up with this giant thread and was going through all of my old DX orders to try to find the grease, looks like the last digit has changed by 2 but probably the same.
Then I see you beat me to it!
My container says 112202 but: https://www.dx.com/p/lubricating-grease-50g-112204
But really, this stuff is fantastic on these control rings. Mine grease is 10 yrs old and it hasn’t separated or gotten weird. It is crazy thick with more resistance than the stock grease.
true, they do not show up
however, it DID happen, the OP has 5 of them
great stocking stuffers! totally intuitive UI
thanks for helping me understand that the lows vary
Ive been reading threads about the V11r for a long time, and nobody seems to agree whether they have 1 lumen lows, per spec, or go lower, as some people claim
I see you have 4 available
https://www.ebay.com/itm/Sunwayman-V11R-XM-L-U2-LED-Torch-500-Lumens-Mini-Flashlight-US-Stock-fast-ship/192695650197?epid=18024967479&hash=item2cdd8e4795:g:5egAAOSw40pbw8iL
Im happy for all or you to get a great deal, sometimes they are just good, and true, and this seems to be one of those times… imo its just a bunch of NOS being unloaded… nothing wrong with the product itself, even at your price of $39.99, they make great stocking stuffers, especially with an AA extender, there is one here if anyone wants it: (not affiliated)
https://www.amazon.com/Sunwayman-V11R-Black-Extender-M10R/dp/B00BETQXY8
congrats