Geoff,
I have the Incra system, which includes the Mast-R-Lift II, CleanSweep ported inserts, CleanSweep box, and the LS positioner with the Super Fence. The Super Fence has its own dust collection port that I connected to the main duct.
This is a photo of the router plate with one of the CleanSweep inserts installed. The set comes with seven inserts with different sized center holes for the cutters.
This is a photo of the router table as I was building it before I attached the drawer faces and door. Disregard the experiment in the top drawer. Using a brad nailer was much faster for these small drawers than the pocket holes . The CleanSweep box is attached to the bottom of the router table and completely encloses the router and lift. The sliding door can be removed for access to the router, or opened slightly for more airflow. I keep it closed and have not noticed any dust or chip residue in the box. The 100mm flexible hose attaches to the bottom of the CleanSweep box and makes the forbidden 90-degree bend to exit the side of the router table.
This is a photo of the side showing the router table with the 2.5-inch flexible hose connected to the Super Fence. The small port in the upper right corner of the side just below the table is a dummy port to store the Super Fence hose when it is not needed.