No Gap Track fitting method.
Just watched Norm's episode of the router table construction. I don't have a dado blade to cut the slot (not that I want one) for the T/U track for the mitre attachment/sled device. If you are laminating your table, which is a good method to build up thickness, and allow easy cutting and fitting of the router plate. Cut the top piece where you want the slot to go. Fix/fasten glue the larger piece. Place U/T track in place,screw down with 2 smaller length screws to hold temporarily, butt smaller piece to it and fix. Cut off overhang from where the track went and a no gap slot.