Baditude, thanks. I've considered the airflow on the 510 on my MVP2. In fact I filed the air channels in the connector down a bit to open it up some, I also drilled out holes in the beauty ring to make sure enough was getting through there. I do vape higher VG juice, so I suppose that could be an issue. Maybe I'll thin down a tank and see if that helps. It's not a huge deal, I get good vapor and flavor, just feel like I'm trying to suck a milkshake through a straw.