@Vapetrees a "primer puff" is taking a draw for a few seconds to get the hot air moving, stopping the draw, exhaling and starting to draw again. That's how you activate the heater in the FW3 by primer puffing. I do this with my EVO a lot too.
At first your inhaling more hot air than vapor which irritates my throat so I pull some hot air out then start to draw.
Like when I use the volcano. I get a flashlight, turn on the fan, then wait until I see vapor before attaching the bag. This way it's all vapor and IMO smoother.
@luckypucky On a scale of 1 being the weakest and 10 the strongest, I would say I draw at about a 6 on average.
Primer puffing helps a lot at low temps. I actually get pretty decent vapor for the lowest setting.
I'm not blowing huge clouds but about the same vapor production I get off my MFLB.
On temp 3 I get a lot more vapor but the vapor is a little harsher at hotter temps. The little water pills truly make a huge difference cooling the vapor and you can see the vapor forming in the pill which is nice!