We bow down to you.
Jesus christ. Thats a heck of a light
Thank you.
Full disclosure though, there are no battery carriers in the light in the picture. With the carrier spring, the carrier is slightly longer than the metal tube.
Add enough carriers, and the springs won't be able to compress enough to screw on the tail cap, and that is the case here. So the light only has the empty tubes.
That said, it probably would work if I cut away some of the spring coils, but I couldn't do that because A) I would ruin the carriers, and B) not all of the carriers belonged to me. And C), those battery extenders are sadly no longer available. COME ON, FENIX!!
That image is a collaboration with a friend of mine, who also owns a TK75, both the 2015 and 2018 model, who supplied the last 2 carriers for the...glory shot.
The light does work fine with 3 carriers though. I got 12x Panasonic NCR18650B's in my Fenix TK76 right now, but that is the max of what will fit without cutting modification.