You can do a review for 50% discount 
Good luck with that! lol
See, every time I think I've come up with something original, turns out I'm either reinventing the wheel without knowing it or somebody steals the idea and puts it out before my lazy ass can get it built.... sheesh!
using the MKR?
Not quite... http://www.ebay.com/itm/300639533243
That should be one heck of a flooder. Which driver and cell arrangement do you intend to use?
HBflex, and figure some way to get the SRK set up for 4S. Probably the easiest way is to copy the EA4-style tailcap setup instead of building a drop-out carrier.
Maybe... read this thread carefully to get an idea of what those drivers do right and what they do wrong. If you go by what it says on the Lightmalls page, you'll be surprised when you hook it up and find it doesn't output a constant voltage or constant current, it varies wildly depending on what string of LEDs you connect to it (lower voltage = higher current).
What kind of emitter is it than and what kind or sink pad is supposed to be mounted on?
That ebay link says it all really, it’s a massive led array capable of a stupid amount of light output. It comes in a ready to mount package already soldered to a “mpcb” with a large surface for thermal transfer on the back. So all you do is solder up the connectors and bolt it securely to a LARGE heatsink.
They’re quite cheap and fun to play around with but a tad tricky to drive to maximum power because of the high voltage/power requirements.
Still waiting for comfy to finish that silly SRK with this emitter in it!
With an (old, dead) XM-L for scale.
It's just 100 one-watt LED dies stuck in the same package, each of the little dark spots is a separate die. Strings of 10 dies in series, 10 of those strings in parallel. Takes around 31-32 volts at 3 amps to run it at full power.
I used a different 100w array (3000k warm white) in a desk lamp, and it burned off half the leaves on a houseplant under the lamp. I had to replace it with a 50w LED with a dimmable driver, the 100w wasn't dimmable.
I said the same thing in another thread (regarding a light), but I gotta say it again.
Its so big! ^^
Would you use for such a monstrous emitter?
http://dx.com/p/20-100w-silver-plated-plastic-smooth-reflector-50mm-39974
http://dx.com/p/20-100w-silver-plated-plastic-smooth-reflector-58mm-39963
http://dx.com/p/jr-82mm-20-300w-electroplate-plastic-reflector-100507
It will work for about 5 minutes and then fry without warning. I built a triple with that driver and a couple others. I think I’m going to build another one soon and when I do it will have a driver for each emitter and use 32650 trustfire batteries. They were rated very well in a recent review.
In all honesty you can get more lumens using Multiple XM-L2 than multiple MT-G2’s. The heat on the MT-G2’s is such a killer. I do have a double MT-G2 that is really nice and I can run it for a long time.