When using stacked dado blades, it is important to first select the appropriate size for your project. The size of the dado set should be based on the width and depth of your cut. Once you’ve selected an appropriate size, you can attach two matching blades to each side of the arbor with a pair of shims in between. It is helpful to use a spacer block when stacking up your blades to ensure they are even and that all teeth line up properly before tightening them down. With both sets attached securely, you can then adjust the height and width of your cut by changing out or adding additional chippers as needed. Finally, make sure that everything is tightened down firmly before starting work on any project!