Here's one that you current tank owners can answer for me - How long are you able to go between fills? Everyone uses juice at different rates, I know. I'm just trying to get an average so I'll know what to expect. I've all but given up dripping because that's all I'm doing - drop after drop after...you get the picture. Cartos are ok, but I find I'm still topping them off every couple drags to keep them wet, especially on my 5v. With the exception of a bottle fed, this seems like the next best thing to keep me from having to fiddle with juice all the time. So on average, how long does a tank last you?