You really can't see the grille block from the photos - good job! I may follow your lead with the number plate - it's a good solution, I think. I found the best way to get the deflectors off was to push them with my thumb so I could get a flat bladed screwdriver underneath, then gently lever up until they're off. It took less than a minute but then I had to spend 15 minutes scratching off the adhesive with my fingernail.
__________________
|