Looking at getting my first sharpner for lower end folders and fixed blades (all under $100 each). I see that the sharpmaker comes highly recommended but that it only handles 30 and 40 degree angles on blades. I also see talk about other angles like 20 degrees etc... Is the sharpmaker univeral enough to handle knives like the Swamp Rat bandicoot, Camillus and KaBar fixed blades?