So I'm having issues filling one of my tanks, specifically my AGA-T, it has a hole at the top, but my bottles either don't fit, or make a seal with the hole, that being said, I've had to fill it up pro-tank style, which is only giving me like half my juice capacity. I saw the Innokin Ucan v2.0, anyone have any experience with it, would it be worth getting? Seems expensive for the single purpose of filling a tank though