Another newbie here; don't know if it was beginner's luck (or I just don't know any better), but so far I really like the Protanks. Bought one, walked out of the store and tried it, walked back in and bought a second.
I'll give you $5 for it.

............... Seems the thin threads is the one downfall ive found on the KPT.............

The weak link probably saved something more expensive.
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Had my protank for 5 weeks and have been really happy with it. To be honest i have become a bit of a fan boy what with the vapor production and ease of use. Now today on the outside of the tank, i saw a little bit of juice around the rims where the metal and glass meet. The top is now wonky and i can really see that it is going to fail soon. The glue is obviously dissolving and this is causing a slow leek. Really sad.
I fixed my airflow problem (too airy) with Nexcare flexible clear tape (I think it's a medical tape, and you can get it at Walgreens or any drug store. It's very stretchy and breathable, but it's easily removed if you make a mistake). I cut a super thin piece (1 mm thick, and long enough to wrap around the holes) and used long needle nose jewelry tweezers to wrap it around the airholes, just above the threading. I did get a tiny bit of the tape on the edge on the threading, but it doesn't affect how the protank threads into my devices; I've taken it on and off many times now with no problem.
You can cut a longer piece, and wrap it around the airholes, and use the tweezers to tamp it down. If the draw is too tight, unwrap some of the tape with the tweezers and cut some off; continue until you get the perfect amount of airflow. I like this method better than the toothpick one. I was afraid I wouldn't be able to get the toothpick piece out if I made the draw too tight.
I finally bought a protank today, so I am bouncing between a vivi nova and that.
Note that I have only been doing this since last Saturday.
I see a pretty good difference between the air flow and flavor.
I'm not sure which I like better...........
DECISIONS DECISIONS!!!!!!!........
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