I love my KGo but, I can't help but be interested in variable voltage PVs. Apollo has 30% off right now on their Vtube kits and I'm really interested in getting one. I'm wondering what your thoughts are on them and what is the difference in the SS & Chrome vs Black & red. When I asked on the live chat on their website they told me that the Chrome & SS had an Ego adapter which just confuses me more. I thought that the Ego was just a 510 threading. Also, does the red kind have different internals than the chrome or SS. And would the Apollo Vtube be better than the Ego-twist??