Awesome! I was worried because people on here saying the airflow isnt the most open, until I realized that is in comparison to EXTREMELY open airflow, so being 2nd of 3rd place isn't that bad haha
I don't mind bottom fill myself either, at all. My herakles is bottom fill and has an annoyingly small space to put droppers between, but its not that bad. Just part of vaping!

Thanks for the reply! And I think I will just use my RDA for single coil builds( though I dont know how conserving even a high resistance single coil build could be in a dripper lol), since the Billow is for dual. Or when I eventually get the TFV4 Mini I can do single coils in either of its RBA heads.