My main vape flavor is Backo. I've been trying to get away from filler based cartos lately so I've tried the Startdusts and I just got a Viva Nova 2.5 yesterday. I filled the Stardust with Backo and quickly gave up on it when I couldn't taste the Backo flavor I'm used to. Now I have the Nova, which seems to be better, I filled it with Backo and while it doesn't taste horrible and has a better draw than the Stardust the Backo flavor isn't there. I'm using the 2.4ohm head. Has anyone been able to use Backo in any of these devices and get a nice flavor? If not, can you recommend some thing?