Just got my sigelei Zmax mini today. Used a kanger T3 mini, and had to screw it down tight in order for it to fire. Anyway, when I unscrewed it to try a different tank, the base of the kanger stayed in place and the tank came off, splilling juice! So to avoid this, turn upside down, hold over a sink, unscrew by using a little force upward on the kanger to keep the base in place. if the base does come unscrewed, it will spill downwards.