I've seen TT do this a few times with the rear fan mounts (back side of MB tray). In some situations it makes sense (when you can mount a radiator + fan and you have ventilation through the side panel. What purpose are the rear fan mounts really going to serve on this case with a Tempered Glass panel mere centimeters away? Not going to be able to get squat for airflow, and even if you could, they are going to blow onto HDDs / SSDs? Looks like TT could have saved some $ on the case cost by leaving those brackets out.