I am making a work bench which will have diagonal bracing in the back and the diagonals will have slots routed in them where they intersect to make them flush. Rather than making a guide for this specific project I want to make an adjustable one so it can be use in a variety of projects where slots are involved, i.e., it should able to guide the router so it can cut slots of differing angles, widths and lengths encountered in different projects. Before I begin, I thought I would ask if others have done this.