I was thinking about using 4 mm Dominos for adjustable shelf pins in a cabinet that I’m building. Has anyone done this? I was also thinking about cutting half mortises in the bottom of the shelf for the Dominos to register in so the shelf doesn’t slide around. I’d clamp scrap to the end of the shelf and center the mortise on the line between the shelf and the scrap and plunge a mortise. Then unclamp the scrap piece, leaving a half mortise on the bottom side to rest on the Domino in the side of the carcass. Any thoughts?