In any of our woodworking projects, there are many details that we pay close attention to. One that I do in every one of my projects is to take the time to clean-up round overs., especially on the inside corners. The issue is that the spinning bit is not able to make a clean corner. I like it to appear that the two sides forming the corner come together like a miter. To do this I use a rasp and sandpaper to clean up the corner. The end result results in very clean lines, no longer muddied up by the limitation of the router bit. Check out the above video where I demonstrate the technique I use to accomplish this.