Lemo 2s will leak like a sieve if there are any open areas on the 2 side openings (ware the juice ports are). You need to use a large enough coil, I use 3mm, to have enough rayon to fill the areas. It doesn't need to be thick or packed in just lightly filled.Thats what I have the Lemo 2. Kinda sucks with it leaking.
I love the tank (have 10 in my st-ache) 3 on my desk, not leaking! Hope this helps.