Hey. I was just reading back through this thread for the fun of it. I see that you had some concern about the output. So, I looked up some stuff, to see if I could satisfy my own curiosity. 
I don’t know what the exact bin of the LEDs is, but looking at djozz’s test thread here, it seems that around 650lm per emitter is reasonable if yours are the same as his. That would give you roughly 1950lm at the LED (s). That is a pretty decent output. But you said it didn’t look like it was much brighter than a XM-L2 at 2.8A current. Part of that will be because the light is spreading out from three LEDs instead of one. Also, those three LEDs don’t have as high lumens/watt efficiency as XM-L2. Part of it also is because it takes almost double light output just to see a significant brightness change at all. And about double is what you’ve (likely) got here, if your emitters match the one used in djozz’s tests. If you then take out a bit for losses through the optic, you were probably seeing just what it should be after all. Anyway, it’s bright enough for me. :innocent:
In case anyone’s interested, Kaidomain still has these Nichia 219C triples for cheap (as of today anyway).