Hi everyone. I am looking to buy my first setup and I think I am going to get an Ego and a vivi nova or kanger. Still learning what they are and what would work best for me, a heavy 1.5 to 2 pad smoker. Everyone says to have a variety of flavors on hand. I get that. But how to you change flavors and how do you keep from having the remains of one flavor interfering with the new one? What about the wick? Do I have to buy a whole bunch of tanks or cartos or atomizers or whatever they are for each different flavor? What is easiest to clean? I appreciate your help. This will also help me decide what delivery system to purchase.