My Kamm attempt:
Also what you don't see is missing roof rails.
Also made patch to missing bit of front bumper end, then it started raining, it was +2C, not the most pleasant weather to work with car. Luckily my patch is galvanized metal, sometime I will spray it black so it is enough good looking.
Not exactly mod, but should help aero, there is also part of upper grille block visible, open hole is for IC:
Here is pic (again very poor pic, camera decided that it is dark even it was not) from front, my cardboard grille block does not like from water obviously. Under the car you can barely see ram air or cold air intake thing, also lower grille block. No any issues with temps with this much of blocking even going up steep hills temps stay ok.
Still many things to do, hub caps, rear wheel well fairing and belly pan for front and rear.