I have a Mini PT2, and would like to use a different drip tip with it. The one I bought fits snugly on my full-size PT2, my Vivi Nova, or any other tank I've come across, but it's wobbly on the Mini PT2. I'm pretty sure it's not just that one either, because I've tried this drip tip on 3 different Minis, and the friendly local vapehaus rep said that's a common issue with the Minis. There's nothing wrong with the tip that came with it, but dangit I like this tip and I want to be able to use it without losing it!