Not Ranked
What confused me about #9 is that you want to "center" the light on the cross. As Daniel Stern described, the left side of the beam should be below the line. The classic way to align headlights was to aim the high beams straight ahead. On dimming, the low beams will end up in the correct place. That technique may be more applicable to the old-style non-Halogen sealed beams than contemporary bulbs.
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