I have tried both methods and with a lot of care, Gabe's method does work quite well. In fact, I was shown the method by Scott at the Vapor4Life's smokeless lounge last monday. Since I've not been using tanks for very long, mine aren't "aged" and the top slides off relatively easy. On the two carts that I've used this method on, it has worked very well and it seems to soak the cart filler very even and thoroughly. I've not need to dry prime either of them since doing using this method. When I refilled these, I use Snowdragon's method of sliding the cart out a bit and dropping new juice in through the opening on top. the drawback to the take the top off method is that it can easily overfill the cart and then leak out the bottom. so it does take practice. But then what doesn't take practice to master. I like getting all of this info, since I'm a total gadget freak, and love vaping for all of the fun "stuff" you get to "play" with. Thank you both for your insight and advice. That's why I like being here than anywhere else.