Heres how I did my setup. coming off a 6" main from a V-3000, there is a wye that is 6x6x4 (4" drop off the main 6") and that goes to another wye that is 4x4x2.5 with the 4" going to the router dust box below the table and around the router and the 2.5" goes to the fence. Combine all that with the Incra lift with the dust ported CleenSweep magnetic inserts and there is never any dust no matter what kind of cut I have made on that table. Its awesome.