The Stubby AIO by Suicide Mods & Orca Vape just kinda rules, assuming ( unlike me ) you can put the Stubby RBA back together CORRECTLY. It’s a no-brainer, but the airflow AND fill port both need to be facing forward. Otherwise, this thing is a beast.

I’m REALLY hoping the big-boro trend takes off and we can get some bangin RBAs for it. It’s a single 18650 but it’s smaller than a Pulse AIO.