^^ I agree. The 18490 battery is an issue for a mod that is designed for 30 watt vaping. The 18650 tube should be included, even at an increase of price, to allow the user to get the best from the mod. The Z2 spec 510 connector is also a real issue, seeing as how it means probably the most popular RBA on the market (Kayfun and associated clones) are reported to not fit flush on many units. Adjustment of the contact screw just moves the gap to the mod itself. There are also reports of units shipping with the fire button not releasing causing the unit to fire constantly. I agree the ZNA is a work of art . It is a truly beautiful piece but it doesn't seem to be ready for prime time, at least not yet. I seriously considered buying one but went another direction due to the issues reported, lack of availability, and weird release practices of his retail dealer. I will reconsider and maybe even buy one later when the issues and availability have been addressed but for now just doesn't make sense. It just seems this thing is still being engineered on the fly.