I just checked my recipe and I use 3.0% Ansinthe flavor with no issues in a Protank II. Come to think of it I've vaped this in a EVOD last night without issue although it did cloud up one of my iClear 30's. Don't believe you really need to use 15% considering how strong this flavor is. If it's cracking glass like you say I would be worried about what it might do to your lungs at that strength.
If you really want a metal tank however get a good kayfun clone and you should be set for a long time. I am waiting on my supplier to get some since he convinced me (after trying both) they are on par with the Russian which is a bit beyond what I can justify right now. If you can afford it get a Russian and you will never go back to cheap tanks ever again.
Im not concerned about my lungs, i have dodged the early death bullet so now im looking forward to dying as an old man... I sure as h*** deserve to live to at least 104 now
Well i have been drooling over a kayfun... Would be fun to cloud chase with one of those... Altho its supposed to be a "dont bug the woman" tank... Ill give a clone a go i guess, cant afford the real deal atm
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M16 helio 0,35
Galileo helio/chimbus 0,5/0,4
Bolt carto tank
Vamo vivi/protank
Kts+ igo-w 0,7