I just now got the time to attempt my first top coil rebuild.....and.....YAY! It is 2.1 ohms! I am so proud and happy! I actually rebuilt the coil to the second tank I purchased in my vape journey, a CE4...lol I vowed to never buy another CE4, and I have not, but I held onto the one that was not a disposable.Gonna attempt it and I will let you know what hapoens! Lol