I appear to be having issues with 555 Nobacco(not WOW) juice and flooding with a 3.0 SC carto. Probably spend more time unflooding tank than vaping, it wasn't a pleasant experience and juice was lost as well.
After doing some research, I determined the issue to be with the number of feed holes in carto and thickness of juice. I covered one of the feed holes with tape, and so far I haven't had any additional flooding issues but only time will tell. Also, the vapor is warmer, tastes better. After a lot of frustration, I'm enjoying the tank again.
Another alternative method for plugging, place a round toothpick in hole, snap off, and trim flush.
If you happen to be experiencing a lot of flooding, especially with certain juice, you want to try this solution.