I am a part timer and have been cutting for the past two years. I have about a dozen residentials. I currently use a hand held angle grinder to sharpen my blades but have a hard time putting an edge on them. I know that I might have to pay for the convenience, but I need something that is good, quick, and easy to use. Time is very important to me since this is actually a second job. I want to look into various sharpeners and since I do not know much about them, want to make sure I do not miss any. All that I have ever heard of is the RBG (?). Please make recommendations of what you think I should check into, or what you would buy if it were you. Thanks!