Brass should be a tiny bit lighter, a little tougher, and much worse thermally than copper 
FW21Pro!
How I would like to have an FW1A Titanium…
I voted for everything except the FW21 Pro. The FW1A Pro was a letdown for me with the chosen emitter
FW 21 should be powered by which cell please? thanks
FW1T (FW1A Titanium)!!
I’m interested in FW21 PRO with 5000K 3V XHP50 and short copper 18350 tube.
The FW21 PRO would need some cooling fins even on the bezel. The bezel seems to be a bit too long, it makes half of the head length.
Logically should be 21700 unprotected
How about a thrower version of this fw21 pro? With a slightly larger head. I'm in for this FW21 pro version.
No plans for FW3S (Stainless Steel) shorty tubes?
Those shorty tubes are popular.
No wonder. I so wish I could get FW4A with a shorty tube and 1634/RGB aux…that would be my dream EDC.
any chance on fw4a pro ? 
In for a brass FW3A and Ti shorty tube if either happen.
copper with cct 20 4000K
I submitted my interest for the FW21 Pro, but like others have said, in NW or warmer only.
Voting totals so far Martin?
it stays open until Neal is back
I also posted on my page and Facebook
hope it gets shared to other communities as well
ythe more units are wanted, the lower the price can be, the more likely is it to have a run
I posted in Flashlight Fanatics, hoping for good response
Thanks. For a light like this where thermal management is a challenge, brass would seem to be an impractical choice.
I voted for FW21 Pro. Very interesting heatsink flashlight head. I think it will be with 3x3V XHP50.2 I guess 