Here is the before:
and here is my inspiration:
2011 Audi A8
I took the advise from above and decided not to go for 100% coverage (at first) I want to keep some of the air flow the way the factory designed it.
here is what I made: found dimpled plastic sheet!
had to make to halves and splice.
put 8 mounting bolts around the panel edge that match the pre-drilled holes on the lower edge of the IMPUL.
I also transfered the factory wheel deflectors:
here is the final product installed. I used all the factory mounting points. The factory pan extends smoothly after my front sheet. The oil change flap is still accessible.