I don't like the angle of the driver seat back (furthest forward notch), so I figured out a way to make it more upright. I removed the 3 torx screws holding the seat back hinge, and drilled 3 more holes to the left (counter-clockwise) of the original 3. Use a compass to mark the centerline of the radius (I failed to do this, and had to use a die grinder to get the holes just right). I used a speaker magnet to catch all the metal chips (worked great!).
Photo of the new mounting position:
Photo of the finished job:
Notice that both seats are in their forward most notch. I still have 2 more rearward notches to match the same angle as the passenger side.