My primary is a Vapor Shark rDNA 40, but also have two Aspire CF Sub Ohm batts and still have my beginning set up as well (Aspire Mini Nautilis and Aspire Battery). I use the Atlantis Sub Tanks and I also have a Kanger Sub Tank. Just built my first RDA (Doge clone) this week, and have already bought another. This is a great hobby for an old man...