Hi, I'm a noob and have no idea what a j tank is, but if it helps...I've been vaping altcig's cinnamon cheese danish in my Smokeless Image clearomizer for the past 3 days without any problems so far. I saw that warning list and was afraid of the cracking problem too, but I'm so desperate to find something that works for me I decided to sacrifice a clearo just to try it. I'm so glad I did... I love it! The cinnamon is definitely there, but not overbearing or super heavy strong so maybe that's why I don't have cracks yet, I'm not sure. The flavor is spot on awesome. After trying so many different juices I read about here... I think I've finally found a vendor with juice I can actually enjoy. Maybe now I will have a fighting chance to quit smoking. I got five different flavors and every one of them tastes great to me.
I hope you get to try the cinnamon cheese danish. I think it tastes awesome.