A lot of people still like 901 for its flavors. I love it for direct dripping. But there aren't many mods made with 901 heads. Why is that? I can only think of the empire mod. Strangely, its clone somehow mutates to 510. Sure, I can always use a 510 to 901 adaptor but that makes the whole PV longer and less steady. Plus, an adaptor doesn't last forever. If the insulator inside breaks, it would cause a short circuit.
