COURUI DO1 'Big Head' (Black/GRAY NOW AVAILABLE) $29.99 @ Gearbest ( use coupon: gbcourui) A long-throw modder's light!

1100 + METER SHOT WITH COURUI ! ! ! by NikolaS

hi Tatasal, I was suggested that these are great lights and escpecially good modded. I was wondering if you would give me some pointers on modding one of these if i bought one?

Hello,
Kindly take look at the op of this thread and you will find ALL the mod threads done by our fellow members at the bottom part. Thanks

awesome ty

I would like to buy this FL but you have to invest almost $30 into proper copper pill, kinda sucks… :expressionless:

Well, that’s not really the case, my original Courui still uses the stock pill (no additional mass or anything) and the performance is totally fine. The copper pills are awesome but I wouldn’t call them absolutely essential. If you get into seriously maximizing throw figures to the last lux and are determined to do runtime performance graphing then sure, copper is the way to go. But then if that’s your goal I don’t think you’d worry about spending the extra on the pill :slight_smile:

Heat sag isn’t really that much of a problem even though the design of the stock shelf is not optimal.

Just order one of those filter ring adapters to firmly retain the shelf and do as much as you can with thermal paste/fujik or aluminium/copper foil to maximize the interface. Should be more than fine.
You could also use liberal amounts of something like JBweld to keep the shelf in place once you’ve adjusted the focus. All of these things will help shed the heat from the shelf.

A large copper pcb like the maxtoch 32mm is also a good idea to beef things up as well. It basically doubles the thermal mass of the shelf, lol :slight_smile:

Not necessarily. I’ve been thinking, and you can potentially do something similar to what O-L did here but use a smaller copper “slug” in the center connected to copper plate backing the pill.
And yes what LinusHofmann said is very true.

OL did some serious work over there. Original pill doesn’t have to be changed, that’s true but it is the weakest point of this light and for this light to be impressive pill has to be replaced. I would really like to make one by myself but unfortunately only tools that I have are dremel and basic drill (most of my drill bits are for wood, have some for concrete but not for metal), no late, no drill press (very useful tool), I don’t have copper sheets or copper pipes, I have some small pieces of copper rods (20mm and 25mm dia x 25mm length) but they are extremely hard to cut with dremel, warm up crazy fast and I don’t have anything else to cut them with. I think that most people that buy them do so because they don’t have proper tools to make them.

Anyway I don’t see anyone using this light in stock form, without modification and we all know that modification (mostly in parts) can cost more than the light itself.
I will have to spend some more time studying available modification threads to see what needs to be done and what can be done with limited resources and then decide, but the gray one looks really nice :slight_smile:

If you mean changing driver and led then sure, I don’t put much praise in the stock components.
However you mentioned the cost of a copper pill as the thing that is putting you off.
I definitely wouldn’t put a copper pill at the top of the list of required changes. Again my original courui uses a bone stock pill shelf (don’t intend on getting a copper pill for it) and is running an xml2 at 6Amps, I mainly only interested in the copper pill because I ended up running a much hotter led in the setup. (Sbt-70 @ 14Amps = ~50watts vs XML2 @ 6Amps = max ~25watts)

I just got mine. It’ll be getting a new emitter and driver, and that’s it. No plans to buy a copper pill either.

Oh that’s nice, do you have a build thread, I would like to see how you mounted SBT inside, more particularly have you modified reflector, I am looking for best solution for my luminus PT54 build. Thought I would use TN31 but grinding that reflector would be an abomination :slight_smile:

Lol

Linus’ Courui is barely recognizable.

The link is in his signature.

Ah yes, now I remembered that I saw that thread several times, subscribed actually :slight_smile:
Well there goes my dream, up in flames :stuck_out_tongue:

could someone suggest me a different( more powerful) driver for this flashlight that i own?
is preferable to change the original xm-l2 with a new one improved quality or bin ?

The next sbt-70 is going into a slightly more conventional Courui, designed around the 86mm kaidomain reflector.
That’s a good option with a large 20mm opening especially useful for large emitters. Bit of a beast to fit into a host but if you don’t want to take a hacksaw to an existing one it’s a good option.

Urgh, I have too many projects ongoing at the moment I haven’t had time to upload any threads. But I’m optimistic for the performance of this combination and it should be a relatively straight forward mod for others to do if they want to make use of this great reflector in a Courui.

Linus, what is that head from that you are using? Please post.

It’s just a stock courui head with two interlocking lens hoods stacked on top. A 77mm and an 82mm hood from ebay. The front will be finished off with an 86mm multicoated UV filter.
Going with this setup will require taking a little bit off the O/D (~1mm) off the reflector to make it fit, alternatively I have a third stage lens hood (86mm) that I can add and make it work with the raw reflector but requires a 95mm UCLp lens and filter ring 95-86mm step down adapter ring to finish off the front.

The hoods and things are pretty cheap and available on ebay, I’ll post something up with specific parts once I’ve had a chance to assemble it all. Don’t want to recommend specific parts until I know they are compatible.

Oh and just to be clear, you would also need to build a pedestal on top of the shelf/pill to raise the emitter some to meet up with the reflector.

That sounds great. Looking forward to it.

This looks very cool Linus :slight_smile: i look forward to see what performance result you will get.

I have been craving a big reflector light for some modding adventures, but i can’t justify buying one of those big expensive reflector light just to rip it apart to get me a host, it is not enough BLF for me :smiley: but this looks the most promising idea yet.

Did some work on the light today removing some material from the reflector to make it fit into the compact configuration (2x hoods + uv filter lens)

Here’s after the first assembly.

The reflector is a beast, though it doesn’t have the most perfectly smooth mirror finish. A very slight OP surface can be seen here.
I have yet to see how it performs in this config but this feature/flaw may make it a good option for an mt-g2 or similar just to help smooth over the honeycomb artefacts slightly. Just a thought, I’m sure it will also produce a very respectable beam with a normal die.

The UV filter and lens on the front: This is a really cheap UV filter but has what it claims is a multiband AR coating. Multiband? Hmm, probably not. But it definitely knocks down the reflections and the unusual green bias has the added benefit of counteracting the green tint shift seen from a dedomed cree led. So this may not be a bad option at all.

Still waiting on some parts to do a working assembly of the full light (led will be an sbt-70), but so far everything is lining up nicely. I like! :slight_smile: