So what is everyone doing on the top fill hole o-ring? I see this one failing with no replacements that I know of. Unless anyone knows another way. Other than that, the nano version is a great RTA, I've been using it a couple days no leaks at all and great flavor. Good buy.
I guess that's the only upside to scoring all those leaky .......s, I have plenty of spare parts available....
If nr. 5 turns out to be a solid one they might just fool me 6 times, I still need a working black Nano too

Maybe @drugarth wants to trade his for my black Serpent mini though