So no work on the host today, but Ive started some thinking on what I want to build for my first true custom scratch built light, however I have a feeling its gonna require some pricy custom driver work. Thinking a rectangular light, with 2 emitter arrangments. 2 18650 cells, and a carrying handle that can clip on and off using a picantinny rail (also be weapon mountable). The 2 emitter arrangements Im thinking is something akin to a Emisar D4 head and a D1 head over and under with a 3 button setup. One button turns on the thrower and cycles it through modes/ramps. The bottom button same for the floody head, and between the 2 some kind of rocker switch for digital zoom? Blend the thrower and flood back and forth for a balanced beam I guess. Seems like the answer to everyones differnt wants? BTW I chose Emisar as examples because of their size/outputs. I feel like those 2 lights could be incorporated into one small size rectangular package with great output. Heat dissapation in the killer here though. Ive often looked at my D4 and considered machining a new host for it that lets it run too its full potential but then realize if Im going to size it up at all I may as well just get the D4S. I also have my old Streamlight LED Survivor from my firefighting days that has been through hell and back. Exploded the rechargable pack in it at one point due to heat but I got it cleaned out and using the AA backup pack its working again. Kinda want to do something with it one of these days to give it a new life.