Angle finder becomes dead-on height indicator

When setting up my router table for cutting half-lap joints, I figured out a quick and reliable way to adjust router bit height with more accuracy than eyeballing it against a rule. I needed to raise the router bit ³⁄₈ " above the table, so I laid a ³⁄₈ " twist drill bit on the router table and rested a flat piece of scrap atop both bits, as shown. After placing an electronic angle finder on the router table and zeroing the scale, I placed the finder on the scrap and raised the router bit until the angle finder read zero.
—Lester Borja, Lansing, Ill.