One of the most important things when cutting box joints is to make sure the width of your dado blade matches the width of the key on your jig. Dado blades come with a number of different chippers and shims and it’s always a cat-and-mouse game to get the right combination for a perfect fit. To help speed up my setup process, I came up with this simple solution. When setting up a dado blade for a box joint jig (or any other jig that requires a dado blade), I use a marker to write directly on the jig which combination of chippers and shims I used. This allows me to quickly set up the jig the next time I use it.