Yesterday spent some time sanding and polishing the headlight covers. Started out with 600 grit, then 1500 grit, and used Blue Magic Restorer for the final buff. Kinda nice being able to see the beams. What is the deal with the three screws for adjusting the headlights? Most that I have adjusted just have two screws. Is the third for the Hi Beams? Thanks for any knowledge, Steven.