Excellent Write Up...
An additional mod that you may want to do, since you have the bumper off and need access to the OEM HID Headlamp assembly... Is to add Two, equally thick, WASHERS on the bottom two assembly screws holding the headlamps in place, In between the CAR and the Headlamps.
For me, anyways, I found that with the Headlamps fully adjusted manually up, and with the in car dash pod set to "max up", there simply wasn't enough Upward light output for those times when you need a little bit more "light down the road" reach (especially if you travel in the US where most highways commuting from rural suburbabs to the the next, are Just not lit).
For most commutes, i have my manual rheostat set at 1 3/4 setting (thanks to the washers) and if it's in the city (pothole heavan) I like to sometimes lower to 2 - 2 1/2 to better locate those nasty craters.
But, on the open road, where it's pitch black (and yes, i respect the drivers who are ahead of me) and I'm running at Highway speeds, I like to seek out a little more heads up lighting and cranking the manual rheostat to max up.