I have been only doing this for almost 4 weeks. I have been using the ego CE 4. Everything was great, but now they are messing up. I started looking online for something else. I am interested in the Kanger Mini Protank 2, Kanger EVOD, Kanger EVOC BBC, Vision V-tox. I only have a couple of ego 650's. I am also tight on money right now. Can any help me with this? 