Thanks guys - Yzer - those videos aren't showing, but I've seen the pbusardo video before of the V3. Woerd - now they show up!
I also read Jeremy's blog post, and it seems that you can safely stack 18350's which is what I was thinking of doing. Have you tried the efest imr's versus the aw's? I assume from that blog post that either will need to be button tops, and that it won't be safe to go below a 1.5ohm atty. That's a shame, because, I was thinking I could run a 1ohm build in the kayfun, and with stacked 18350's be able to get 15watts of power pretty steadily. I know the amps and watts measure out to a lot more than 15 watts, but I figured the chip in the zmax would limit it to 15 watts or 4 amps.
Will stacked 18350's run 8.4volts when freshly charged? If so, I'd guess that the chip in the zmax wouldn't let that get above 4amps, so it could power a 1ohm coil at 15 watts for a while. If this scenario isn't safe, then I'm not even going to bother trying. I just was looking for the lowest ohm atty I could safely run with 15watts of power and for the longest time possible. If that's only 1.5ohms, then I dont' think I'll bother stacking.
Bah....I just remembered the zmax wont fire below 1.2ohms anyway - so I guess 1.5 it is !