if your referring to the smoktech rsst rba then drill the hole out to 1.5mm on the top cap
No it's a Smoktech 510 Screw tank cartomizer. It used to be fine, but recently when its attached to my Vamo or Kamry K1000 it feels tight. There is no air going through and it no longer works on my grand Vapor mod.
Screw the carto-tank in tight then back it off a quarter turn to let the air get to the air holes at the bottom of the carto.