I have a D4V2 with this LEDs. Tint is yellow. Ok for me, but not great. Green is usually not dominant at this color temperature. With more red in it, the tint goes to orange. I have a XM-L2 at 3000K that looks very orange in contrast. E21A at 3000K is a whole different thing qualitywise. So, the 3000K SST-20 is not the best 3000K LED of all times, but it is certainly not bad either. A bad 4000K SST-20 can be much worser.
Probably been asked before, but I couldn’t see it sorry - will there be a d4sv2 in brass? or possibly ti/copper or is it going to be limited to the D4V2 only?.
Hank does the KR 18350 tube allow use of lanyard ring? Is this new for the TI? I don’t think my KR4 Alu makes contact in 18350 form with lanyard ring installed. I wish it did.
The Ti version 18350 does allow to use the lanyard ring, but the aluminum version does not allow to use the lanyard ring. The pictures on the site show it all.
Amazing! Although this flashlight hobby is taking a life of its own…
You should offer copper head as option on standard (alumium) KR4 and D4v2.
The copper head is so heavy I bet you could find someone to trade you tubes
Oh drat, that Ti makes my alu obsolete 
Erm, what are shipping rates to Germany currently? 
Hank, are the indentations on the copper able to fit a 6mm x 1.5mm tritium vial? If so, how many are there on it?
Also, I have a D4V2 Ti E21a on the way and thinking about getting a KR4 Ti E21a, if I like it. I have read that on the E21a LEDs the 10622 optic that is the default does not work well and the more diffused 10623 works a lot better. Do the E21a lights come with the 10623 optic as default, since it works better, or do we have to purchase the optic as an accessory and replace it when we get the light?
I was just wondering if any new lights were on the horizon that I couldn’t resist and then this pops up. Order placed!
My KR4 E21A came with the 10623 default. Works great.
Oh, my word……
Curse you Hank! I don’t need to be buying more flashlights.
Quite OK, i bought the KR1 June 1st, according PostNL it will be delivered tomorrow
Two days ago I ordered a brass D4V2 c E21A, and then Hank KR4 Ti put on sale. What do I do…
Hank are you planning to produce a KR1 titan as well?
Yes, same here.
And even better would be a Noctigon headlamp, mule style, to replace my Zebralight mule