haha! I'm sure other Taz6 owners would appreciate having multiple options out there. Love your LED integration, I was thinking of adding a flat surface for a small strip of flexible LED strip, but was concerned the "spotlight" would overpower my OctoPrint webcam's lack of dynamic range.
I imagined the steep downward turn of this duct would cause some resistance to the overall air stream, so the divider in the middle is there to isolate turbulence. The upper section is given bigger exit path for the slower/more turbulent air while the lower section is designed to have a near straight path for faster/higher airflow to cool the hotter (lower) side of the heat sink.