When I first read your post, I went and checked Vape Naked's video about the leak fix. I just cannot see how closing the AFC ring during assembly would make any difference in the tank leaking. Really, air has to enter the tank in order for the juice to seep through the coil and enter into the AFC.
I have a Nautilus that, for no apparent reason, dumped about 2 ml of juice through the coil into the AFC, and then down the side of my mod--all while I was asleep. I couldn't understand it. I then did a careful comparison of my Nautilus that leaked and my Mini Nautilus that never leaks. The silicone seals on both tanks appeared fine, no tears, burs, or blemishes. But, when I looked at the top of the glass cylinders, I did find a difference. On the Mini Nautilus, the top of the glass cylinder is smooth, as one would expect. On the Nautilus, however, the top of the glass cylinder is slightly bumpy. On the spare glass cylinder that came with my Nautilus, the bumpiness was less pronounced, so I put that one on the tank. I have not had any juice dumps since opting for the spare cylinder, so I am inclined to think I found the problem.