I don't have a Nautilus, but I have followed some of the reviews and threads. I am curious if anyone has tried a vertical coil in this tank yet? From what I have seen of its design, it appears that the head is almost a perfect design for a vertical coil with cotton wicking wrapped around it, securing it in place and wicking from the side material. Seems like it would wick well from the side fill material, and the wrapped wick would close the sides, making the air funnel through the vertical coil. I know that there are vapers rebuilding these heads, and would like to know if someone has tried this build yet. Seems like it might be worth a try. I could get interested in this tank if a build like this gets this tank cranking.