I'm sure there are threads about this piece of junk. But I'm venting. I have an army of pro tanks. Never felt the need to upgrade. I finally went to the store and asked for a pro tank 3. They just had uni tanks. Ok. I'll take one. What a mistake. Why with the big spring? Why the trap door that barely let's liquid into the coil when you want it but if there is a drop in there when you remove the cap to fill, that spring opens and let's the liquid right out the other end. Silly. And because it is so dang tight, I remove one tiny flavor wick...now I just have a liquid strainer and no working device. Aside from the fact that I feel like I'm drinking a frozen milkshake through a coffee straw. What is the point of this tank? I have heard poor things about the Pro 3 as well, so I guess I'm just gonna keep rebuilding my first gens...I suppose kanger ' motto is "if it ain't broke, fix it until it is". What a let down.