Wow comfy. That’s some nice polishing there.
Fine, I’m in for one. Also I’m stupid envious of all that you’ve done in this thread.
Oh my goodness man, what do you use to polish this baby this buttery smooth. Mothers mag and aluminum polish? HFT stick polish? I need to know with what and how! Amazing.
Yep, well, Eagle One mag/aluminum polish (it's just jewelers' rouge) first on plain printer paper with a little paste smeared on, then a final light polish with a tiny bit of paste on cotton cloth. I go straight from wet sanding on 600 grit just to get it flat and then right to the polish, all that crazy mess with multiple grits before polishing is just wasted time, the end product is exactly the same.
Put me down for 1 in the group buy 
Thanks. Now I know the secret to get an amazing mirror finish. I tried using mothers mag polish on a light, with a cotton dremel pad and I swear it looks nothing like the mirror finish you created. 600 grit is the key I see!
A triple in a light this small? I thought the Z1 was bright in stock form, I honestly never thought I would see a light this small pushing this many lumens. You are doing great things for this hobby. Please do us all a favor and sell us one of these.
Wait, jewelers rouge on printer paper after the 600 grit…? Do you mount the assembly upside down in a drill press and the bring the piece down onto a flat plate with paper and rouge? Or hold the piece upside down and do figure 8’s as with lapping a surface? However it’s done, the results are very impressive. A new gold standard.
Use the paper+jewelers' rouge on a glass plate, just like you would if you were using ultra-fine grit sandpaper.
Thanks, Comfy!
Keep these 219B, or switch to XPG2 4C?
well done
The only driver I have on hand that will fit into the pill is one of these things. Not bad, really, 5 mode with blinkies but it doesn't have memory and resets back to high after only about 1 second. Bridging the pad between the MCU pin and the ground ring switches it to 3 mode: high, low, strobe.
The little FET is awful, even with the resistor removed it only does 5.5A from a 20R, but of course a 20R won't fit in the light. The 16340s I have will only do about 2.75A. I have some AW 16340s on the way, and eventually the driver will be replaced with a BLF 15DD. I also have yet to polish the TIR before I make a judgement on whether shaving it down to ~17mm affected the beam. I think the Nichias are going to get replaced by some XPG2s, especially if the amps are going to stay in the please-don't-burn-my-hand-again range.
very good work! is an amazing mod, I love it :heart_eyes:
Nice build! What are your expectations of amps on IMR and XP-G2s?
Looking forward for final results 
Oooh shiny, that's better
Don't know yet, I haven't used either the new-design driver or the AW IMRs yet. I'll have to experiment with it a bit.
I vote for Nichia 219b 5500K! The Vf at 1.5A (that is about what it is going to be per led?) is 0.15 V lower than the xp-g2, with the same output.