Geekvape Ammit MTL RTA (there's an RDA by the same name too). Is a bit finicky to get the coil in the perfect place due to the airflow from different sides, but once you nailed it, it's a cracking tank. 24mm though, if that's an issue.
Not sure where you can get it now. Got mine from Le Petit Vapoteur, but seems no longer available there.
I've got the Ammit, Obs and the rdta Crewella recommended on the way, thanks all.
Already tried her with the True, Savour and Hastur Mini and god knows every build I do, following various foolproof leakproof tutorials, she makes them leak [emoji1787][emoji1787][emoji1787]