HelchiorDon't know about the validity of fasttech, but that Amazon link is to a different model, the Prince Mini. I do already have two of that model. While it's a good little light, I was most intrigued in the Duke for a Mini sized light with a side clicker. I'm also interested in some Olight models, but I just really like the look of the carbon fiber. Probably why my Prince Copper is my go-to light when I don't need ultra compact.