You may wanna look at the EVOD and pick up a Joyetech Twist or a Vision Spinner batt.
http://www.theveteranvaper.com/evod-mt-bcc-metal-bottom-coil-changeable/
The redux does not wick well at all. The Nova can have wicking problems if you are chain vaping. What kind of batt do you have? Is it variable voltage?
You will get a hotter vape if you bump up the voltage. Regarding getting juice down the center tube, I blow it out thru the mouthpiece into a tissue before I put it on my batt. I would recommend getting an Ego Twist or a Vision Spinner.
here's one. http://www.ecigcrib.com/Lava-Tube-VV-Mini-Starter-Kit-p/ec-lavatubeminikit.htm
If you Google mini lavatube there are other suppliers that carry it.