I like my back to be no more than about 45 degrees when on the hoods. seat position is slight bend in knee at bottom of pedal stroke and the hips remain still, no rocking as this would mean that the saddle is to high. The for and aft I am not sure were that is measured on the knee but is something like a line off of the knee when cranks are parallel to the ground that the ball of the foot and the knee are centered as close to the center axle of the pedal as possible, but not sure what part of the knee the plum bob hangs from though. Maybe look at the Lemond fit book.