What is it that makes the BF-1 so picky on the wicking? I was looking at it, but I'm not a fan of stuff that takes a doctorate to wick properly.It's the Apex, yes thanks for picking that up (had forgotten the name). It's been the one and only near perfect restricted DL tank out of a great many used. Nearest to it is the flash-e-vapor BF1, but that requires specific setup with one full open pin and one 1.2mm, and the wicking has to be exactly right. The apex is set-it-and-forget-it.
Considering the Aston or the DotRDA 22mm as well.