Astrolux FT03S copper, brass
Astrolux FT03 Mini copper, brass
Lumintop FW21 Pro copper
Lumintop FW3A brass (newest purchase)
Lumintop GT Nano copper
Lumintop GT Nano brass
None in titanium just yet 
Looking at the horses in your stable: you’re not a patina type of person.
Tell you the truth: neither am I.
Great collection. Wow, those copper and brass FT03S’s must weigh a ton!
Interesting that you swapped the tubes on the FT03 mini.
Can you let me know if your FW3A in brass has the original FW3A driver, or the newer one?
(LEFT = original driver mbpcb, RIGHT = newer version)
Copper Sundae 
Xevious: Looks like it is the original driver.
BTW: I just realised that I have one titanium light: Olight i5R.