Actually, the chrome trim piece can be removed without removing the bumper - you just have to be a little nimble. Here's what I did:
1. Remove the two obvious screws at the bottom right and left
2. Pull the chrome assembly toward the rear of the car until the forward tabs on the chrome part slip out of the slots in the underbody panel. (The main part of the bumper cover will flex toward the rear to allow this to happen)
3. Now, you can ease your hand above the chrome piece (from the forward edge) and use an allen wrench to undo the large bolt that secures the chrome piece to the main part of the bumper.
4.While you're in there, use a flashlight to locate the 4 tabs that secure the chrome piece to the bumper cover.
5. Slide a butter knife into the gap between the bumper and chrome piece to release each of the 4 tabs that secure the chrome piece to the bumper, and pull toward the rear a little.
6. When all 4 tabs are released, the chrome piece will come out in your hand toward the rear.
The damage to the chrome piece on my car was caused by backing up to a pretty high curb, and not noticing it until the curb had gotten all the way under the chrome piece to the forward tips. When I tried to pull away from the curb, the forward tips grabbed onto the curb top and RRRip!
SUGGESTION:If you find yourself having contacted a curb (or other object) with the front or rear of your Tesla, RAISE THE CAR SUSPENSION before attempting to drive off.
Eric