I guess “unique” would be a solid way to explain the BP Mods SURE RTA. Does a stellar MTL and RDL vape. The 1.2mm is my jam for MTL but it does go all the way down to 0.8mm and up to 3mm.
The airflow, while not super smooth, it’s not super sharp or turbulent either, it’s just kinda “fine”. Top cap isn’t nearly as much of an issue as I thought it would be, for the most part, if you treat it like an RDA, you should be good. If the cap came off and sat horizontally for an extended period of time, yeah it would probably make a mess and leak everywhere.