What is up with folks making there own clamps lately? It looks nice, and you can make it with scrap wood and a bit of PVC pipe. But…why not just get cheap ones at harbor freight? Or online at amazon? If anything I would take on of those and modify them with the “pins”.
https://www.homemadetools.net/forum/corner-clamp-pin-video-86683?homelistings#post186269