From the editors of WOOD magazine
We're not sure why they still call it 3/4" plywood anymore, because over the years, the thickness has shrunk by 1/32" or more. In fact, the thickness of plywood can vary from sheet to sheet and sometimes even within the same sheet. So how do you rout airtight dadoes to fit these odd sizes? In this video, WOOD Magazine Techniques Editor Bob Wilson demonstrates the simplest shop-made jig we've ever seen that guarantees not only perfect-fitting dadoes, but also dadoes exactly where you want them.
This how-to woodworking video runs 9 minutes.