I'm not a trained touched typist, but I type from a much closer angle; 45 degrees or even less (maybe because I've been playing guitar with nails almost as long as I've been typing!). It may not be correct by the book, but I average around 100wpm so it hasn't been an obstacle to typing fast and accurately. Unless there are RSI risks that I don't know about or something, you might want to think about simply changing your typing style.