Nice giveaway gChart :+1:
I really need some more flashlights 
, I got 4, but only 2 (Q8 and Convoy S9) work right now, the other two (Convoy X3 and S3) are waiting for drivers and emitters.
I don’t know what exactly counts as “contributing to this forum in some useful manner”, but here are some links:
LED drivers and Accessories you want, but don’t exist (lots of posts in there)
D.I.Y. Illuminated Tailcap - gChart Editions - #33 by Schoki
GFS16 - Battery Indicator Tailcap Light & 1mR FET Tailswitch! (Rev B) - #57 by Schoki