The build quality is above reproach. In addition to the small Selbstwicklerkopf are still in two-way heads. Even with the dual-coil evaporators of Kanger Pro 3 he copes well. This provides a significant range of usages. The subtank Mini is absolutely tight. Nowhere is from Liquid. I have them now mothballed two in use and my old. Anyone looking for a prolemlosen and visually appealing evaporator will be happy with this. Addendum: I am currently using it to them the BVC Aspire evaporator heads. I have the top opening with a Entrater widened to the evaporators something so that the thicker tube of Kanger fits. They are also a viable alternative.