The new crop has been growing for about 4 weeks now. The photo below shows a view looking down on the system with the plant starter top plate removed. You can see the extensive root systems the plants have developed.
Below I highlighted the tube that connects between levels. This tube can slide down to expose the roots so that they can be pruned and pushed back up into the pod above. Without pruning, the plants expend a lot of energy growing VERY long roots that tangle things up between pods.