I did something basically identical to this last night. However after cutting the cart, I put the rubbery part with the hole in it thats at the end of the cartomizer, and put it into the end that goes into the
tank. Also I put my regular drip tip on it instead of using the storm
tanks tip.
One thing I noticed after doing that is that I can hold it upside down vertically, or any other way for that matter, and it doesn't leak at all. It's like the rubber tip from the cartomizer forms a seal with the silicon cap over the coil.