A better video to show off my slot mortising machine. More about the machine: http://woodgears.ca/slot_mortiser Plans available here: http://woodgears.ca. I have always used a home-made slot mortising machine for my mortise and tenon joints. My previous slot mortising machine was made possible because of a lucky surplus. Building the jig part 1: Building the jig part 2: Setting up a bridle joint: Templates for multiple lap joints.