Hey Gnatx,
I see your point, but how much r&d actually takes place? The cartomizer, I think you would agree, has been around for a while. In my mind the only thing really being r&ded is the
tank that houses the cartomizer. Basically building a container that is durable and will not leak. A fuel filter although not being used for inhalation is designed to keep a highly volitale liquid contained while being under pressure from a pump and installed in a 150F-170F enviroment! IMO, change the orings to a inhalation acceptable material, modify the housing to except a cart and away we go.
I greatly appreciate your response, you have really peaked my interest on this one.