Do this grinders have enough power to sharpen 3 sets of blades , two to three times per week ? I have been using a angle grinder for years but have been considering purchasing the rbg 2181 which gives you the ability to sharpen up to a 9 1/2 in. depth . I'am not looking to spend $ 1000 on a magnamatic and want to get away from the angle grinder . Thanks Scott.