I did my order - not Vapocolypse yet, but just a test. I got some of the "hit" nic salts from Nic River. Did a lot of research, and it appears that the hit version is benzoic acid, and that's the one that seems most efficient (more so than the 2nd most common salicylic). I'll try it at the same 14mg level I've been mixing, and see if I can feel it hit the bloodstream faster. Maybe it'll slow me down a little in my mid-afternoon binges, or when I've had a couple of beers.
I usually order 48mg, because that's what I started with. I'd thought it'd be safer, and more forgiving if I was a little off. Then, I just kept using it because all my bottles were marked for easy juice mixing. I had 100mg in my cart, and was shocked at the cost. It was 3x the amount when ordering 100mg ($25 vs. $8). I didn't take a screen shot, but there was a popup with some sort of info about higher shipping for over 60mg nic, because it was considered hazardous, I believe.