Already have a Protank, Protank 2 or Protank 3 and considering the new Aerotank. Have I got a deal for you. Instead of paying the $20 something plus to cop the new Aerotank. Why not just buy the Kangertech Aerotank Base instead? Cost? A mere $5.99 over at Sun-Vapers. Basically… all you have to do is replace your existing base with the new Kangertech Aerotank Base. And, now you now have airflow control! All I can say is that it’s kinda awesome that Sun-Vapers is already offering this part. Especially since the Aerotank has just started to hit the market.