@Mazinny , I am a Protank lover too but I am using STMs more and more. I have several. Although I have not tried the PT coils in one (yet), the rba for the STM is very easy to build on. And as Chanel said, with the AFC closed down, it gives a MTL hit comparable (to me) to an AFC on a Protank (not closed down) . Perhaps slightly airier, but not enough to bother me.
What are the PT coils for the STM?