I have an IGO-W and I'm planning to rebuild it this week for the first time. I was wondering what factor does the size of the Silica Wick have to do with the overall performance of the atty? I think I'm going to get 3mm Silica Wick for my IGO-W because I think my friend is running the same thing. Also whats the difference between nichrome vs. kanthal wire? And how is ekowool vs silica?