Decided to pick one up because the price is right. So far have only done 1 nickel build at .07 ohms on my meter. 28 gauge 1 6 wrap dual coil to be exact. I forget the actual inner diameter. The device however is displaying 0.00 ohm in joules mode. Still fires even though it supposedly will only build down to 0.05 ohm. Other than that issue I love the device. I'll try another build soon to see if the device is off. Just curious as to if anyone else has had this issue.