Speechless. What an amazing effort. Love the end product, admire your skills and wonder about the patience.
Beamshot 1 - Courui on the left at 5,01A, Small sun on the right at 4,85A. Pictures are taken with older Smartphone.
Beamshots - controle picture, distance around 400 meters.
Beamshots - On high, distance around 400 meters.
This great mod is now added to this thread’s consolidated mod threads at the bottom of the op: COURUI DO1 'Big Head' (Black/GRAY NOW AVAILABLE) $29.99 @ Gearbest ( use coupon: gbcourui) A long-throw modder's light!
It’s great to see another person’s take on a light that you are familiar with.
A lot of work went into this one, that’s for sure!
Well done, Cula 
Wow, just wow! Great job!! I too love the look of polished copper! Shame to hide it in the light...
Does anyone know how well the Courui responds to a MT-G2? Primarily I am interested in maximum throw. I know that the mt-g2 is a very large led and can be difficult to get to throw well.
Everyone's already said it, but that is some great work. Lots of time, care and skill went into that one!
Fantastic work, Cula 
I am mightily impressed by your work. It’s super!
(…wish I had one, too 
)
Artistry in Motion!
Found myself saying "Wow!" out loud at least 5 or 6 times as I read your post. Amazing work!!!
Thank you for your offer, maybe in near future. I have to get my hands on something new to work on before selling this one.
I Didn't weight it before but now it is 560g without batteries. It's heavy in hand.
This really took a lot of patience to finish. Like 2 months of patience .
Yes, it's a real shame. But it is now posted here on BLF where people will appreciate this kind of work. Good comments and a killer thrower is all I need.
Thanks Old-Lumens, I learned a lot from your posts and You tube videos. You are one of the reasons that I got myself into this great hobby.
It must be really satisfying when the solder traces polish out and just disappear 8)
Wow that looks awesome! I love heaps of copper!!
First dibs if you ever sell it! haha
Hmmm. Another one infected by OL. l guess we have something in common. 
I one tried to solder 3 thin round pieces of copper together, but failed miserably.
Lots of air in between and places the solder didn't flow.. also I have no real vise. Just a cheapo from eBay. (Max do a is about 4- 5cm)
Are yours totally connected with solder? And how did you do it?
NO!!! I asked him first if he was selling it!!! So I get first "dibs"!!!
This helps a lot when you try to solder bigger pieces http://www.banggood.com/MT100-Cordless-Gas-Soldering-Iron-Gun-DIY-Welding-Iron-Melting-Torch-p-926639.html
But first you have to apply solder on both sides completely covering the surfaces. When applied and cooled, use blowtorch (or a powerful soldering iron - min 60W) to melt it again and press it so that excess solder is pushed out. I prefer using small blowtorch like one I linked above because it is much easier to heat up objects. For a few dollars you get a very good tool to do this kind of work.
You did an absolutely amazing job.
First DIB’s on your next piece of artistic work! J) If you ever decide to sell it! Excellent job! 
This is just great, i love how you took the low resistance mods to the next level here
Thanks for some great ideas for future Courui D01 mods