Excellent review and photos. Looks like a solid light and this review makes me want one immediately. To chime in on the mode/tail switch issue. The solution with this light is exactly the same as that of the Solarforce M8 I believe, and it's the one thing I'm not too crazy about on that light. I don't like the idea of having to carry an extra switch and I don't really care for the modes as the manufacturer has selected them. Same as with the reviewer (Foy) on the M8, I would want a Medium setting in the multi-mode and I would not want the Strobe at all. Of all my lights, I think the most elegant solution to multiple modes is on my Balder BD-2. Standard is 3 mode H-M-L. When the light is switched to Low, after 5 seconds it blinks once. User can then turn it off and the light switches to 5 mode with strobe and SOS. Best of both worlds. Alternative you refer to with the head twist for tactical is also a great solution, and I agree it is preferable to the two cap option presented here.
Very nice review. Thank you for taking the time to do all of this. The one thing that hit me right in the face, was the difference in tint between the Catapault and the Niwalker. The tint on the Niwalker looks like a cool white. The tint on the Catapault looks a little warmer or even neutral, thus being more suitable to my eye. But the Niwalker does look like a good heavy-duty light. I would like to see a few more light options as well.
I'd like to see this light directly compared to the Solarforce M8. From what I can tell it appears to be very similar right down to the "A.I." type switch. I'm wondering what features/quality differences push it into the "well over 100$" price range vs. the M8's $70 price tag?
Very nice review BTW.
Tony
Thanks for the comments here. I am not sure if I am able to discuss our products here, might be agaist the rules? but we`re following for sure.
I think this forum is much more open. Feel free to enlighten us! 
Solarforce lists the M8 at 277g so, this light at 380g is heavier . . . also, the M8 is 245mm with 2 x 18650 and this one is 263mm. No doubt the SS bezel adds a little weight - I actually like a little heft in a light like this.
I think I was getting just 1.57 amps with 2 unprotected Panasonic 2350s and 2.40 amps with 1 protected Solarforce 2400. My guess is, this guy is brighter.
Foy
I really like BLF as here is more open.
It`s easy to get maximum brightness or throw out of a LED however we need to consider reliability and durability for long term use. There are more than 100 companies offer LED lights if you google on internet but only very few of them manufacture lights, therefore you see similarities of other brand products. We wish to be sustainable in the market so we have to be caution before we do anything.
As for NWK750 we are getting 100 minutes runtime on tactical switch now and 760 OTF lumens. We are discussing with some customers regarding the UI. We might change it later but still not "twisting" to access other modes.
Thanks again for the comments here they are very informative. If anyone has better idea please let us know too.
Nice! Thanks for listening to us!
Has the lens on this light got any anti reflective coating?
Has this light got low voltage warning like the Taiblo A7 ?
We will consider AR coating on the lens.
You will know its time to change the battery when the light gets dim