My I-ATTY from Fasttech arrived yesterday. It came built w/wick n wire already in place. There was a little bag of goodies containing wick, wire, screwdriver, 'O' rings, and another wick already rolled and I assume oxidized. The 510 threading on the base is funky and is not right. It's almost as if the die was a cheap one used to create the threads and not deep enough into the rod during production. When I put it on my ProVari I had to be real careful as to not screw up the PV threading. Putting it on a 600mah battery was not an issue. The unit read .8 ohms on the ProVari and did not fire every single time. That may be due to the low resistance build. When it did fire, great taste and good vape volume.