Very few routers are an exact fit to a mounting plate. If you insert an inlay guide bushing in the plate and it's centering pin in your router it will properly align them to drill new holes in the plate. Remove your sub base plate from your router and take your mounting screws to a hardware store and get the same size transfer screws. These are a internal hex drive with a point on the other end. Install these in your mounting holes so they protrude the same distance below the base. A light tap to mark the location and then drill and counter sink your holes. Save the transfer screws so you can mount the router in another plate or table in the future.
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