This modification to my router table allows me to use a round over bit on the legs, even though they are much wider mid-way along the length.
It consists of a riser block mounted to the table using two of the four standard mounting holes. Using all four would have been possible, but I wanted to be able to instal and remove this for normal operation. By using only two bolts, the router mount does not fall off the bottom of the table during change over.
The riser block is two pieces of 3/4 ply glued together and glued to 1/4 masonite. The four holes in the masonite are transfered from the original clear router base. The extension collet is necessary to raise the bit up to the level of the riser block.
The real trick was the hole for the bit. I wanted it to be sized for the round over bit with no extra space taking away from the surface area or for things to fall into. I intended to run the bit up from the bottom, first a bottom cutting bit to cut a hole big enough for the bearing to fit through, then a second time with the 5/8” round over bit. The problem was, the bit and standard collet was too short, but the collet extension made it too long to even start. I finally got it done, but it too all day… Now I want to make two more, one for the 3/4” round over bit, and one hand-held for the 3/16 round over bit.
As you can see, you can route really close to the seat joint.