Hello everyone, I am fairly new to vaping and just got my new switchback mod from vapor beast. It is my first upgrade from a cig look a like. I like the cartos and clearos a lot that came with it but they just don't hold enough liquid. I would like to get a tank for my switchback but not all 510 threaded products will fit it. I want a tank that is no larger than 3ml, will last for a long time, easy to fill/clean, and will work with my switchback. Any suggestions?? Thanks in advance!