Anyone else having a problem with the Uforce tank leaking? I got the Voopoo Mojo/Uforce kit & love the Mojo. I love the flavor the Uforce produces. However I can't get the tank to stop leaking. I am using VG eliquid, using the tank within the proper wattage range, have tried every trick in the book to maintain the proper vacuum when filling, have tried multiple coils to no avail. I ecee purchased a second Uforce tank hoping the first one was flawed. Both tanks leak like sieves. I have been vaping for 4 1/2 years, so not new to how sub ohm tanks are supposed to work. Is there an inherant flaw in the tank or the coils? I have not seen any reviews or posts of others having this problem. Anyone have any fixes besides closing airflow when filling, & inverting to open the airflow? That doesn't work for me with this tank.