This elaborate jig, and the very similar WoodRat, allow you to move both the workpiece and the router independently for a wide variety of precise joinery and cutting operations, including dovetails. The router goes on a baseplate, where it can stay fixed or slide in various directions. An aluminum extrusion slides below, controlled by a hand crank, and holds various clamps and fixtures for supporting the stock. Versatility is the big selling point here, but there is a learning curve for each function and a lot of accessories. For mortising, you need an optional table attachment and special guide rails. It takes 20 minutes or so to attach the table and accessories each time, and the table needs to be raised or lowered for each new stock thickness, which is an awkward process.

The Router Boss is available for about $800, and an accompanying mortise table kit is available for about $200. www.chipsfly.com. 

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