I just started using (about 5 hours ago) my ego-t type B. I have 4 different flavours to choose from, and 5 total tanks. Right now I have 2 tanks in use, each with a different flavor. Should I have as many as 4 different tanks with different flavors (to rotate between), and if so....what is the best way to remember what flavor is in what tank? Who has a good system?