I'm also having leaking issues, but only seems to occur after a few back to back powered draws. I noticed that the threads on the top cap are total crap and I had a hell of a time getting them to seat properly. When it floods/leaks it REALLY floods and leaks all over the place. Other than that the draw is way too airy, so I'm hoping it's just the stock coil, and I'll try a new one and report back
I also have a hassle getting that top cap to seat properly. When it's not that seems to be when I get the gurgling.