Bummer on the crack. Did you drop it by any chance or use a juice that cracks them? I think you can order replacement tubes if you want to go that route. I don't have personal experience but I think the vvn is supposed to be fairly durable, but make sure it's vision as there are clones out there.
I have the smok redux which is similar to the ce5. I like them but I'm down to two from the original four because they don't seem to survive a drop well. Not bad drops either, both cases was just knocking my pv off my desk, but the redux cracked down at the bottom ring and started leaking.
I also have the dream 804 which uses the vvn tank. I've dropped them a few times and they've survived ok.
Yeal, the 34 ga should work well with cotton in about anything. It's a good compromise between durability and resistance per inch of wire.
The mini I have is not a Vision, I know that for sure. I am fairly certain I haven't used any tank-crackers, just some fruits (blueberry, strawberry...some cheesecakes, and a whole lot of RY4D blends (love em!) I did have a drop yesterday, but it was off my recliner on to carpet, so if that was what made it happen then dang!! It's fairly cracked up the more that I look at it- not leaking yet though so it's still in service for now.
Anyhoo, the place I got my mini from doesn't sell replacement tubes, I found a place that sells then pretty cheap but didn't want to pay the shipping just for a few replacement tubes lol. I went ahead and ordered 3 Ce5's, have 100ft of 34g kanthal on the way, and gonna get some cotton rounds tomorrow and boil 'em up. I am probably a bit more excited about this endeavor than I should be lol.
Thanks for the help and I'll be back with (hopefully) my success story