Well now that I have bought (and sold most of) almost all of the sigelei mechanical mods that were released, I must say the sigelei #8 is the best performer out of the box. The sigelei #8 was my first of the 6 or 7 I have owned and required the least amount of modifications to it. It is definitely the one I would recommend as a first to others, and here is a very informative Sigelei article that may be of interest to new and experienced alike.