We are using it to sharpen some blades, I think I am doing something wrong =). I am having a hard time getting blades sharp in 10 minutes let alone 30 secs =). There is no doubt something is going on, but I don't know what. I am mechanically inclined, and have a another high end sharpener for all my my woodworking chisels, knives etc so I am familiar with the equipment. I am following the directions in the manual, but they seem somewhat vague. How do you go about handling blades with gouges in them, rough edges etc? Seems after about 100 passes I still have a flat edge. As far as my curvy hustler mulching blades, fuhgettabatit Pointers are welcome! Thanks.