I've been free hand filing my own chains for years, but although I've gotten by and it seems like I can sometimes get my chain to cut as good as a new chain, I'm frequently not altogether happy with the way my saw is cutting. I know there are other factors besides chain sharpening that can affect how well a chainsaw cuts, but I'm thinking that buying some kind of file guide or other filing system might help to reduce the number of potential problems. The Granberg bar mounted file guide system looked good, but the reviews I saw for it led me to believe it isn't well made and breaks easily. I would prefer a non-electric system. I don't mind a system that's slower to use, especially if it's low-tech (less to break and therefore longer lasting), less expensive, and more transportable. Is a basic file guide (like I've seen sell for about $13) all I need? I'd like something that helps me file my drags to just the right depth, too. What do you all recommend?