Hi again,
I just finished mounting the part yesterday.
For those of you who don't know - these pillars have really poor mounting.
The pillar is only mounted with tabs (!) under the big painted part, and then mounted with only a few screws along one side (where the pillar meets the side window). It is in no way attached to the roof, at the "roofside" of the pillar.
I think a sidewind catched the pillar while driving and bended it up/to the side so much that it cracked and fell off. I will reinforce the mounting with some type of glue/silicone underneath, and with screws at the front and the back, so it doesn't happen again.
This cost me around 800$ total, for the part and paintjob. I did the mounting myself, took about 1 hour. But here's the result. It's all good now. All good