Reply by bpalmer60

I have used it like that when the center line of both parts is such that you are leaving a reveal. The jig is designed to work along the centerline or a part. One can shift the center line on one part by adding a scrap piece on one side of the jig when you clamp it on. For example a 1/8” piece of scrap inserted on the left side of the jig moves the cenrer line to the right by 1/8” on the part. add the scrap to the right side and the Center line moves left. I have used business card stock to position the Jig Cneter line ecatly where I want the center line of the mortise.

Bill

-- Bill, Missouri, http://billsgarageworkshop.blogspot.com/