I couldn't find a similar thread on this topic so I thought I would share my latest mod. As with alot of users here, I was not happy with the headlight level while driving at night and I was surprised to see that most people use the adjustment screws on the headlights themselves instead of taking advantage of the AFS system. The AFS system auto raises and lowers the headlight level based on input from a sensor located behind the drivers rear wheel. A lot of cars have an adjustable link on that sensor to compensate for headlight level and makes it easy to set the both headlights at the desired level with one adjustment. AUnfortunately the GSF does not so doing this requires purchasing of an aftermarket link to replace this:

The reasoning can be explained here:


Cusco, Tanabe, and RSR all make adjustable AFS links (called "levelizers") with different ranges.
According to my measurements, the stock link measures 66mm and needs to be longer to compensate. I opted for the Cusco 00B 628 A simply because its available on Amazon and has a range of 73-90mm.
I installed the link in the shortest (~73mm) setting and to my surprise, it resulted in what I deem to be a "perfect" headlight level. The best part is that I now have an adjustable AFS link and can fine tune my headlight level by loosening the jam nuts.
Installed it looks like this:


One callout I do need to make is that you need some really thin wrenches to adjust and lock the nuts in but other than that it was a simple install. At the very minimum I wanted to present this as an alternative option for adjusting the headlights for the GSF.

 

You can do that, but it reduces the range of adjustment when the car is loaded. You're way better off to use the screws to retain the full range of automatic adjustment.

 

As the car gets lower to the ground (loaded), the arm where the link mounts goes up higher into the wheel well. Since this link is longer, technically I am gaining range of adjustment when the car is loaded and maybe losing some range when the car is unloaded.
With regards to range of motion, I moved the bracket connected to the AFS sensor (while it was free) up and down and there is a TON of range available (much more than the control arm could move in its normal range of motion).

But as always YMMV and what is a "perfect" headlight height for one person, may be too high/too low for another.