Yes, you are correct on all counts.
At least, I'm pretty sure you are. I got one of these in the mail today and am juuuust about through my first tank. I used one of the pre-built heads on a whim and I'm definitely impressed!
Great flavor and vapor production. I'm using mine on a Reuleaux rx200 at 43 watts (.31Ohms at 3.65 volts according to the device). It does take a couple of seconds to ramp up, but if I go much higher than that, it's just too dang hot (not burnt, just
extremely warm) for me! The only issue I've had is some minor leaking when I filled it for the very first time. I'm pretty sure I overdid it with the priming, since I've destroyed other heads in the past by not priming them enough. But this was no biggie
Oh and it's not a stupid question. It never hurts to be sure of something!