I think your front bumperettes are on upside down (either that or mine are

). Your rear bumperettes look a little strange. I don't think they are upside down, but the face should be flat. Maybe the bumper itself is tweaked some? Odd that the front side reflectors have been shaved, but not the rear marker lights. A good thing that they are gone, however.
It is great to get all those spares with the car. What you can't use will be good trading material. The front turn signal/marker lens and the tail lights are getting to be unobtanium. Parts that also fit an E9 are gold...like the front grills, headlight buckets, Engine parts.
A great looking Bav! It will be a fun and rewarding project.