@David spent a few days making significant upgrades to the router table. He installed the dust box surrounding the router motor, and modified the cabinet to get the 4" vacuum hose in there. The splitter is now functional, with a 2.5 inch hose to the back of the fence. So it has dual dust pickup now. That required some structural modifications to the table, and he spend a couple of days getting this upgrade installed. He also repaired the lift, so the router is good to go.
Thanks, @David !