Or have a 50 dollar tank melt in my hands......
(Kayfun center post insulator ring a bell?)

all me tanks are surgical Stainless Steel, haven't built hot enough to melt one yet.

haven't cracked or broken one either. And never melted an insulator on a Russian/Kayfun, but have vaped the Russian at like 70 watts

But then, must say, have paid more than $50 for most me tanks. lmao. Did melt the insulators on the Aqua though, but hey, 0.20 build, accidently locked firing switch, went to the bathroom, came back to a fog filled London night, and one hot mod........these things happen.
Only thing that has rung my bell lately is the Gus Estia and the flashi on the T6, plus a few other apv's.
Vape long and Prosper.!!!!