Woods, I use a stack robber on my wall tents, and never use a damper. It seems the extra air intake into the robber helps gassify and cleanly burn anything headed up the pipe. I like the Kifaru design, as the extra air intake helps burn anything down low in the pipe. With a backpackable stove, the surface area of the pipe is much greater than the area of the stove itself, therefore, I would guess that more heat is realized in the tent from the pipe than the stove itself. I'm in the process of building some stoves, and (I'll know after more testing) I'm thinking the spark arester at the top of the pipe won't work near as well as the robber/arrester down low. I like the robber you've designed, any more details? Thanks, Tim.
