Hi and welcome. That Kbox is a nice piece of gear. Nothing fancy, but it works just fine and you get what you pay for. It would be helpful to know what you wanted in a mod before advising you regarding what to get, but for smaller, single battery rigs like your Kbox, Sigelei and Cloupor both make nice entries. My favorite two-battery rig right now is the Smok Koopor Plus, but it's a bit bigger than some others. It's a super rig, upgraedable firmware, 5 wire, TCR input, lots of goodies. Also look at a Wismec Reuleaux RX200. That's a 3-battery mod, but it's very small and ergonomic, it's actually way smaller than my Koopor, but thicker in the middle because it's two batteries wide there. It also has all the goodies, it actually capable of a full 200 watts RMS, not that many people actually vape that high, and is the best buy on the market right now IMHO.
