I've been hearing great things about the results, but where can I purchase the actual set up? And would it be problematic on a Volt X2 Manual?
And...most importantly, how the hell does it work?
Volt X2 (and any sealed gen2 batts) can only use certain 901 atty, SI recommend
Spare Atomizer for GP901
Usage is easy, it's called 'direct dripping': drip 2-3 drops directly into the metal mesh inside the atty tube. Then vape away. After 6-8 draw, the vapor will be gone or the taste change, it's time to drip again. That's all. Just don't drip and drive

- or you can use cartridge (like cartomizer but without atty, just filler), never try that, so far satisfied with direct drip.
901-T is a bit different. You don't need to drip, you just fill the tank and place it in the atty tube. This should help:
BE901-T/DSE901-T tank system e-cigarette manual sheet|901-T e-cigarette instruction booklet
I like the simplicity of KR8 batt + 901 atty, especially for tasting juice. No need to waste cartos on something I probably won't like.
Regarding Volt X2, I don't know which 901-T to use, never try it.