I am going to be working on making a small box out of walnut this weekend and in planning it out in my head I'm not sure how I will get the lid to work like I want. I want a fitted lid, out of one solid piece of wood, no hinges, that is recessed to allow the corresponding rabbets on the bottom of the box to fit inside the lid, nesting so to speak. I am not sure how I can accurately cut the recess though in the lid. The only option I thought about was using a planer bit on my router table, with a stop on either side of the fence and make passes while adjusting the fence to eventually cut out (or scoop out) all the recess. I just want to take care not to cut through the edges. Here is a very rough sketch.