I like the fact that I can build a coil in my Kanger SubTank mini, but I havent used it yet. I have a Kayfun that I love. But I like being able to swap a coil, with out draining juice, and roll. So I wonder why so many seem to get a subtank only to build on it with the RBA deck. Along those lines, how do the subtanks with RBA's compare to standard RTAs? Im just being lazy, and want some decent clouds, so the coils are great.