Hello all. This is my first new thread.
. I am still quite the newby and looking for some input on something that I have been doing with my 510-T tanks and also a few 510 cartridges. I have been lurking around the ecf for a week or so and have been looking for solution to the leaking problem that some of us are having with our 510's. From what I gathered from many other threads is that there are a few things you can do such as lining up the air holes and pre-punching the tanks, making sure the wick is properly positioned, etc. I had tried all of the suggestion I could find and they did help, but they did not completly stop the problem. What I finally did that has stopped the leaking on mine was to use a very small amount of silicone grease along the edge were the tank finally rests against the atty.I use the tip of a nice sharp tooth pick to apply just a couple dabs around the edge between the air holes/slots and the raised rim and then use my finger to spread it making sure I dont get it in the air holes/slots. Then push the tank on and if any excess silicone grease slips out between the tank and atty just wipe off. The goal would be to not have that much extra. Now I am not urging people to do this cause if you are not careful and use a very small amount of silicone grease you may end up getting it inside the atty. I just carefully clean the inside of the atty with a clean q-tip between tanks and keep a watchfull eye to make sure that no silicone grease is building up. I would also like to point out that I am using silicone grease and Not silicone caulk. Please do not use caulk. It is not a substitute and has many nasty chemicals in it. Silicone grease is what is used for repacking and lubricating faucet handles and other plumbing fixtures and is found in the plumbing isle at most hardware stores. If you could find a food grade grease with a fairly high melting temperature that would probably also work. I have had great success with this so far and have actually been using the same tanks over and over more times than I been able to keep track. It also works with 510 Cartridges with the same success. ( it makes life more enjoyable when your fingers are not all sticky from e-juice when you are having a nic fit )
Please feel free to comment. I am once again not advocating this, just saying it has been working great for me so far. Thanks for reading. And thanks to whoever started the ecf. It has been a wonderful tool for exploring and learning 
