Why would you want it too? The wood is under the rail and the foot rides on the table. Even if the router had an offset base (about 5mm) that caught the wood over the grooves it would not be stable as the grooves are so close to the edge of the wood, leaving 40% or so of the router unsupported. This is exactly when the foot shines as it keeps you from relying only on your own ability to keep it from wobbleing. An offset base, in this application, would need to be exactly the height of your material and the rail to provide maximum stability, and ride on the table not the wood. The foot does this easily. Maybe I am missing something.