Whether it's the Nautilus or the Kanger mega it doesn't seem to matter, It gurgles. I've tried all airflow holes, have tried different v/w levels, tried slowing the draw, it's always the same, Gurgle. Hell, I have found my old vivi nova's to be more reliable. I have another of each on their way via post, more $ just to see if it was a product spoof. Hey, don't get me wrong, I respect any and all companies or individuals for attempting to improve the hardware but frankly I'm weary of throwing away my money in the hopes that this new (insert name here) will be my holy grail. Frustrating.