Yikes - maybe I'll just send it to Dale 
. Hopefully I can get it Monday, work on it asap to find out - hoping....
I just bought one at TaoBao @ US$73. This light is very heavy! With 4 CaroNite 26650, it weight 1.464kg. Luckily it has no glue anywhere, hand removal is applicable. Compared to TK61, the reflector has the same diameter and depth, but the base seat on LED side has larger diameter. They have similar spot appearance, but due to bigger hole, larger gasket and LED sit lower, the BOSS1 has the ring shapes around the hot spot.
Stock Flashlight is around 700-800 lumens. TK61 is far brighter. May be due to the thin silver coated springs high resistant contact point. And the LED is aluminium base.
Will modify this to MT-G2 using 18x7135-350mah driver which designed for 3x xml by the brand of HONDS.
Excellent! Post some pics for us!
Thanks CWK, interesting news. The TK61 throw #'s are a bit all over the place, from maybe 550 kcd, 620 kcd, to as high as 740 kcd from vinh here. Hard to say what can be accomplished with this, but has many possibilities.
How about shaved XHP70? or maybe even XHP35-HI as an alternative to XPL-HI, for thighter beam!
I am using iPhone and could not find the appropriate link to set into this forum, but you can see some of the BOSS1 photos here:
BOSS1
Good pics, thanks. Any chance it could take any pictures with other common lights to compare size?
Nice collection of lights wkchin. B-)
Inset 20 mm for the star looks like, almost flat reflector - slight flare up at the hole. Looks like that big pill top may be a screw-in, like a COURUI.
That driver does not inspire confidence!
Presumably, center point contact on a driver pcb is if you want to use one 26650 cell in the center of the battery tube which is a bit strange since all cell are in parallel so you could use 1 or 2 or 3 or 4 cells anyway…
Driver is pretty simplistic - those 0 resistors are basically jumpers, so no restrictions coming out of the two FET's. Makes you wonder why there's no decent amps, if output is 700-800 lumens.
+1 nice taste in throwers 
I like your throwers!
That driver was obviously designed to be simply a contact board for us to do driver mods. 
Palight has given us a blank canvas to work on 
Those 2 little mosfets should deliver more power than that, I’ve used them on 10mm drivers and had at least 3A even from a 10440 cell, up to 5A from an 18650…. and that’s just one of those FET’s. Surely we can easily piggyback a better driver onto that big board and get some serious output out of the thing… Should be able to get a real 1600 lumens from an XP-L pretty easily. Even a de-domed XP-G2 in the 5-5.5A range should rock in that big reflector. Hate seeing that massive flat bottom though. Sure poses issues, surmountable but unnecessary if it was made a little different to begin with.
Could the low current be related to the high vf of xml2 ?
When the higher Vf XM-L2’s first came out, everyone was agast at the lower current that was max. Then we discovered that while the current indeed was lower, the output was almost the same or… in some cases… actually higher!
I’ve seen an XM-L2 U4 1C do 1811 lumens in an Eagle Eye X6. Tom saw 1900 before I think. These emitters are capable of making some great output, and their new efficiency allows them to do so with lower amp draw, saving your cells while still delivering.
This big hoss of a light surely can do more in the output department. And surely WILL do more, in the hands of some of the BLF members… Round 1, Tom E. 
Maybe machine a collar and use the KD reflector like that TK61 mod…
Thanks for the explanation Dale.
Alex - I was hoping this reflector would work better with emitters larger than a dedomed xpg. The KD reflector works awesome with smaller dies but in my opinion has a sliding scale of awesomeness related to the size of die (e.g. big die = not awesome).
wkhchin81
thanks! could you also measure the size of the reflector?