#1
With a name like Billet, my mind goes to something military.
I'm thinking on one side, a pinup girl like you'd see on the noses of WWII bombers. Something like this (could always tweak it and put a PV in her hand, or add a slogan like
vape Strong):
On the other side, a military(like) crest. Either a true military crest, or an adapted one where you could replace a sword with a PV, and wings with plumes of vapor.
For inspiration:
or
I had a funny thought to tweak the whole SAS crest a bit like I said. Then for the motto, replace it with: Who vapes, lives. Or Who vapes, wins.
Just my lack of sleep addled ramblings.

Thanks for the contest. It'll be fun seeing what you come up with.