Setting bit height is either a hit-or-miss proposition based on eyeballing or a simple measuring task featuring a depth gauge jig. The latter approach is faster and more accurate. Plus, it saves aging knees by eliminating that awkward hunkering-down motion to reach bit level. With a depth gauge, you simply set the desired bit height and then raise the bit until it hits the bottom of the slide bar. With a piloted bit, make sure the slide clears the bearing and touches the cutter.