I get the same leaking, so much that when I take the atty off my mod the bottom of the atty will be dripping liquid. I just assumed it was from the condensation from the air holes. Now it makes me thing differently.
Finally, now I know I'm not crazy.
Does your top cap sit flush with the bottom of the deck?
UPDATE: After a new build and some cleaning, I managed to get the top cap to sit flush with the deck. Now, on my new second Tsunami, the only "leaking" seems to be from condensation from the airholes and a slow, little seepage from between the top cap and deck at the airhole slot sections (which may be due to juice in between the deck and top cap, or from condensation?) Either way, it is definitely a manageable, and I guess, expected amount of "leaking" and not the dripping on my mod after every 10 minutes of use like with my first unit. Maybe one day I'll miss with my first one and see if I can get the perfect O-rings to make it work without leaking like crazy. Until then at least I have an extra set of drip tips, screws, O-rings, and potentially an extra Tsunami!
Love this atty, but it's still not perfect for me. I'm still on that search for a top-airflow only, velocity-style deck, deep juice well atty...