I haven't used the Protank or clearomizers much. There is a different issue with using cartos, which I use in a carto tank. After removing and replacing a carto tank a dozen times or more for filling the center post of the carto may compress and fail to make contact with the 510 connector center post. This problem would happen with all carto makes. The solution is easy. I just use a push pin to pry out the center post a mm or so to its correct position. I don't tighten the carto tank down into the 510 connector as far as possible: just far enough to make electrical contact without any wobble on the carto tank.
Yup!
There is a similar problem with Kanger BCC clearomizers, especially when you screw it too tightly onto the battery (in hope to prevent leaking). It actully causes leaks in some instances. The clearos should be just making electrical contact--no more. The base of the clearos needs to be screwed on tightly onto the body, however.
