Nice mods! 8)
Do you know if a KK 4200ICR delivers the full 4,56A, and how long it will be able to stay above 4A?
Well, throw seems right there, but lumens - I checked, re-checked, checked with another light.... Now I have a lot of confidence in the PVC lightbox, built by rdrfronty and manxbuggy1, and used by several others. TurboBB seemed to be the first with this particular PVC design, and in his tests, he got good results across the spectrum of flooders and throwers, so I'm thinking these #'s are pretty good.
It is high #'s but pretty high amps as well - I have to re-check readings, but I believe they are 4.2-4.5, in that range, which is very efficient for an XM-L2 on copper. I really, really like the KK's over any other battery because not only does it deliver high amps, but it keeps the amps high much longer than a IMR or high current 18650 cell. This is the main reason why I prefer single cell 26650 lights over a 18650 single cell.
Well, funny because I always said you can't get 4.5A on a 7135 based driver, single cell, for an XM-L2 or XP-G2 on copper. Let me re-check tailcap readings -- it was difficult on this light because of the anodizing on the threads, and the outer shell is very thin, so I've been using the top edge to connect to with the DMM lead.
nice job Tom, I may get another to play with but this one is staying stock, its too good at what I want it to do to play with.
my stepson has taken mine away loaded with rechargeable Panasonic aa’s for his week long scout camp. hope he looks after it.
It's just begging to have the head drilled out and filled with a press-fit plug cut from copper bar stock.
Nice work as always Tom! This torch is definitely moving up my list…… but I really should limit myself. 
Ok - got a 4.26A measurement at the highest with the cell at 4.00v, so I'm thinking that's pretty up there. Sprayed CRC 2-26 on my 12 gauge DMM lead ends and that helped get a higher and more consistent amp reading (before I was getting only 3.0-3.7A), so, there's lies my amp measurement problems.....
Weights:
XintTD X3 w/KK 26650 cell: 400 grams
HD 2010 w/KK 26650 cell, copper added to inside of pill: 396 grams
You can tell just by the feel it has weight to it. It's got a thick alum tailcap too, but the smallest, cheapest looking switch around.
Thanks for the info. I have not pushed the XM-L2 beyond 4A from a single cell yet.
Ill stick to 4,2-4,3A as absolute upper limit. Small gain for limited time in going higher.
I usually go to 3.5 or 3.85A for C8 size lights, and 4.2A for HD2010/SS T08 sized lights, but this hunk of metal I figured could do more - I don't think I've ever seen this amount of weight in such a small sized light and the uni-body construction must help. I ran it for 6 minutes straight on high and it holds up well - well warm but nothing crazy.
At 350g stock, no cells, it's heavier than a SRK or most standard 2 cell throwers like the STL-V2, TF X9, or bigger head single cell lights like the HD2010 and Small Sun T08, and all associated lights in the same form factor.
Nice job Tom. That is an impressive gain.
That looks like a nice light that didn’t quite get finished at the factory. As a stock flashlight, it seems lacking. After Tom’s work, dynoMITE! :party: It throws 551m?!!
always fun to hear your modded light Tom 
Wow Tom, cool stuff! I'm satisfied with my stock X3. If it gives me a problem in the future, I'll mod mine just like yours. (I may need to get in touch with you on some of the details)
I was wondering the same - awesome mod, but dont you Tom feel like its stock version should be worth more like 30-35$ rather than 45-47$?
Well you could argue the price I suppose, but figure a XinTD C8 at $30, this has a SS bezel, weighs a ton more because of all the solid aluminum, seems to have an excellent reflector, same length as the C8 but bigger head/reflector. What is a shame, for me, is it targets the triple AA carrier, but I would have preferred it as a 26650 targeted design (can only take short 26650 cells with lots of side slop). Of course the finished anodizing and threading is awesome. Also the 22 gauge wires and QLite driver is a hugh plus too.
Nice work and great pictures, thanks for sharing!
I have never modded a light before. I want to replace the stock board with a U2 Noctigon. Do I just buy this http://intl-outdoor.com/noctigon-xm20-mcpcb-cree-xml2-u2-1a-led-p-749.html unscrew the bezel, de-solder the wires, replace with the noctigon and solder the wires back? Does something need to be done under the board?
Thanks
Well.... Not so simple, but basically that is the procedure. As shown above, I had a hard time prying up the existing star because it was epoxied down. Then you have to clean up all the old epoxy. I'd recommend using a thermal grease instead of epoxy for seating down the new replacement star.
Notice I filled in the hole a bit with copper.
Anyone try dropping a mtg2 in this light yet ???
I did for a bit, I used 3 14500 in the triple AA battery carrier, worked well, but prefer XML2 in this light for the throw (Convoy X3 not XinTD)