I started vaping with a eGo kit. The battery, eGo charger, clearomizers, ejuice. Next step was better clearomizers such as the Evod then to the ProTank Mini 2. Battery was next as I purchased 2 joyetech C-Twist 1000mah. I enjoyed the flavor more as I could adjust the voltage up or down. I really enjoy my Evods and Mini ProTanks so I purchased 2 of the Innokin VV V-3 battery's. I went with the VV because it has eGo threading and my Evod's and Mini's work perfectly on it. My confusion comes from mods such as the Provari, Lamo, Provape, etc as they all use the 510 threading. Why don't those models come with the eGo thread? Is there some sort of advantage?