I just got a bunch of clearomizers in a trade and took a piece of steel tubing I had cut off of a metal ce2 and cut that to the propper length than removed the clearomizer tube and replaced it with the steel tube I cut down. Now I have an adapter that I can re-use. The fit is really tight I needed to use pliers to get the tube on. The best part is now I don't have to cut down any more ce2's. No leaks, there is an o ring on the clearomizer base that will seal it inside the tube.