The V4 is much improved and I really like the vape even better than the Nautilus. There are two airflow holes in the ring that are elongated so you can rotate the ring to tighten the draw. Mine came pre wicked and coiled but way too low resistance for my vamo. After recoiling and wicking with silica the vaping produces sic amounts of vapor that taste really good. I moved the wick lower on the sides to shorten the distance from the wick holes to the coil ie less wick length. This also puts the coils closer to being directly over the air holes one for each side/coil. Mine came with extra orings, seals, small Philips screw driver, extra kanthal (wrong gauge for me), screws and silica wick. I washed all with vodka and water.
Pros: great vapor production taste and throat hit, glass tank, adjustable air flow, bottom dual coil fairly easy to rebuild, adjustable 510 center post extra orings and seals.
Cons: threads are scratchy, bottom screw fill hole, holds less eliquid than nautilus and wobbly drip tip.
Tips: lower the coils, put a little juice on them to help them stay in the grooves when screwing on the chimney. Chimney is actually two pieces so you can screw on the bottom part look inside and make some adjustments to coil alignment so it doesn't touch sides or posts if necessary.
Recommended improvements: The design is really almost there for me. Need a top fill port with stopper not screw - pretty sure I can make that modification myself with a small drill and drill press. Tighten the drip tip hole. Adjustment air ring is not too loose but could loosen over time. Since it uses elongated holes on the ring for flow control, detents like on the nautilus wouldn't work so an adjustable air flow with detents and different size holes would be better i think ie more like the nautilus. Cut better threads. Instead of Philips coil screws, would like to see spring loaded. Now I'm just getting picky. Maybe narrow down the center post platform.
Love the Fogger V4. Huge cloud of dense cool vapor. No leaks or flooding or dry hits on mine yet. Aesthetics to me are good, stainless steel and glass, has fogger and v4 logos.
Not that it needs it but I got to thinking about modifying the chimney for a vortex/swirling action. Old trick on engine intakes and used in vacuums today. But like I said, not that it needs it just could be a cool idea, vortex could increase volume flow rate and mix.