My setup uses a 1/2" router mounted above the workpiece. The router height is fixed about 2" above the lower table. A bearing on the lower table is used to guide the jig while routing. Verticle adjustment by the plunge router, while the router can be moved horizontally in line with the guide beariing. A router extension is required and multiple shallow cuts. Each molding set is almost one of a kind.
3 different router bits were needed for my molding.
Will post photos when I get my 10 posts.