look in the op man. It gives you pictures on how to use a 7_16 and 1 1_8 socket to tilt the head useing the draw bolts at the back of the header frame.
We are using the standard knifes. We adjusted the bolt in the back until it made a small indention into the pan under the auger. Don't any farther than that, or you will have noticeable dents.
