@Basnard, I've found the Ulton clone of the Typhoon GT IV not bad at all for an rta. And there's an optional MTL positive pin that you can get as well, if you're needing more restrictive airflow.
But for ease of use you probably can't beat RDTA's and rda's, as much easier to work with as you don't end up with air locks forming.
But for ease of use you probably can't beat RDTA's and rda's, as much easier to work with as you don't end up with air locks forming.