Airflow makes sense. Electrical and mechanical seem irrelevant. However, I solved the airflow issue with an adaptor. But the large aspire tanks will still flood once the level of the juice gets down to the atty and the vacuum can't be maintained. This doesn't happen with the ET-S. I still haven't figure out why.
It only takes a small fraction of a droplet cause a problem if that droplet is down inside the 510threadwell which is already filled by the 510 threading of the tank itself; with an eGo thread, that small droplet is not that significant.